# 6 apps that make the most of iPhone Duo's screen

Source: PageCrawl.io Blog
URL: https://pagecrawl.io/blog/best-iphone-duo-apps
Published: 2 November, 2026

---

**Last reviewed November 2, 2026:** app descriptions, release dates and image sources checked against the linked developer pages and current App Store listings.

This shortlist focuses on six apps with considered layouts and a concrete reason to use iPhone Duo's screen. PageCrawl, GoodLinks, Tasks, SuperPlanner, Finalist and Mercury Weather cover monitoring, reading, planning and forecasts. We chose them for clear typography, coherent controls and useful relationships between the two sides of the display.

We build PageCrawl, so this is our own shortlist, with a closer look at the design choices in our app. Our team had been looking forward to iPhone Duo for a long time. Upgrading gave us the opportunity to rethink how reviewing website changes should work with the extra space. The other apps are described from the developers' own Duo media, guides and release notes, linked beside each example.

Every app has at least five images showing its actual Duo interface. The PageCrawl views are our own captures from the released app; the other galleries use official developer screenshots and press artwork, credited in each caption. All six apps have released their Duo updates. Open any image for a closer look.

### Which six apps make the best use of iPhone Duo's screen?

Choose an app around the task you want Duo to improve. PageCrawl keeps website changes in context, while the other picks make room for articles, project boards, schedules and forecasts. Each gallery shows how the layout supports that task, whether the phone is closed, open or partly folded.

| App | Best fit for this shortlist | What to notice on Duo |
| --- | --- | --- |
| **PageCrawl** | Reviewing website changes | Timeline beside the selected change, with its summary and text differences together |
| **GoodLinks** | Saving articles and highlights | Article list beside the reader on the inner display |
| **Tasks** | Managing project boards | One column closed, a full board open, with task cards clear of the crease |
| **SuperPlanner** | Planning a day with time blocks | The day beside its summary, with activity tasks below or beside it when partly folded |
| **Finalist** | A daily plan for every pose | Remembered Daily layouts for each way you hold Duo |
| **Mercury Weather** | Comparing forecasts | Locations beside the forecast, or two weather windows together |

The useful design question is what opening the phone helps you do. A second column can preserve context, while a larger canvas can make the content easier to follow. PageCrawl uses both ideas: the timeline stays beside a change, and screenshots can appear together for comparison.

### 1. Why is PageCrawl a good fit for iPhone Duo?

PageCrawl uses Duo's larger display to keep your timeline beside the website change you are reviewing. Choose an update on the left, then read its AI summary and actual text differences on the right. When there is enough room for both panes, the next update stays in view while you inspect the current one.

```gallery
{
  "title": "PageCrawl: five views on iPhone Duo",
  "images": [
    {
      "src": "/images/blog/iphone-duo-pagecrawl-timeline.png",
      "alt": "PageCrawl on the iPhone Duo inner display, with the Timeline beside the selected OpenAI Blog change, its AI summary and the added lines.",
      "label": "Duo: Timeline and change",
      "caption": "The Timeline stays beside the selected change, with its AI summary and the actual text differences.",
      "width": 3093,
      "height": 2247,
      "thumbnail": "/images/blog/iphone-duo-pagecrawl-timeline-thumb.webp"
    },
    {
      "src": "/images/blog/iphone-duo-pagecrawl-focus.png",
      "alt": "PageCrawl on the iPhone Duo inner display with the timeline hidden, so the selected change and its differences use the full width.",
      "label": "Duo: Focus on change",
      "caption": "Focus on change hides the timeline so the selected change uses the whole inner display.",
      "width": 3093,
      "height": 2247,
      "thumbnail": "/images/blog/iphone-duo-pagecrawl-focus-thumb.webp"
    },
    {
      "src": "/images/blog/iphone-duo-pagecrawl-price.png",
      "alt": "Costco Gold Star Membership price history on iPhone Duo, showing the fee rising from $60 to $65.",
      "label": "Duo: Price history",
      "caption": "A price monitor shows its history beside the change: the Gold Star membership fee rose from $60 to $65.",
      "width": 3093,
      "height": 2247,
      "thumbnail": "/images/blog/iphone-duo-pagecrawl-price-thumb.webp"
    },
    {
      "src": "/images/blog/iphone-duo-pagecrawl-report.png",
      "alt": "A PageCrawl Weekly briefing on iPhone Duo, with a written summary beside the critical and important changes.",
      "label": "Duo: Summary report",
      "caption": "A Weekly briefing: eight changes across eight pages, with the written summary beside the changes that matter most.",
      "width": 3093,
      "height": 2247,
      "thumbnail": "/images/blog/iphone-duo-pagecrawl-report-thumb.webp"
    },
    {
      "src": "/images/blog/iphone-duo-pagecrawl-outer-detail.png",
      "alt": "The selected OpenAI Blog change on the iPhone Duo outer display, with its AI summary and the Changes only view.",
      "label": "Duo: Change, outer display",
      "caption": "Close Duo and the same change continues on the outer display.",
      "width": 1574,
      "height": 2194,
      "thumbnail": "/images/blog/iphone-duo-pagecrawl-outer-detail-thumb.webp"
    }
  ]
}
```

These views show PageCrawl 1.3.0 on Duo's inner and outer displays, using the Demo workspace. The monitored changes are real historical examples, not current news, prices or stock updates.

#### Timeline and Focus on change

**Timeline** lists changes across your monitored pages. Choose a row to open its summary and the actual text differences, shown as **Changes only**, **Added only** or **All text**. When you need to read closely, **Focus on change** hides the timeline and gives the selected change the whole display; **Show timeline** brings the list back without losing your place.

#### Before and Now screenshots together

For monitors that save screenshots, the comparison viewer shows Before on the left and Now on the right when there is enough room, and you can zoom into either one. On a narrower display, touch and hold the screenshot to see Before.

#### Overview, reports and price history

**Overview** groups changes by importance over Today, 7 days, 30 days or 90 days, with recent summary reports near the top. A product monitor adds price, stock or availability history, so a single update can be read as part of a longer pattern.

#### Open, close or move to iPad without changing the task

Open Duo to bring the timeline alongside the selected change; close it to keep reading that change on the outer display. The selected text-comparison mode carries across, and the same review adapts to an iPad window as it widens or narrows.

The [PageCrawl Duo walkthrough](/blog/pagecrawl-iphone-duo) covers Pages, setup, reports, filters and alert settings in more detail. For app links, visit the [PageCrawl mobile app page](/mobile-app).

### 2. Why try GoodLinks for reading and research?

GoodLinks is a useful reading companion for Duo: save articles for offline reading, organize them with tags, and keep highlights and notes together. Its official Duo images show the article list beside the reader on the inner display, with compact reading and highlighting on the outer screen, as shown in the [GoodLinks press kit](https://goodlinks.app/press/).

[GoodLinks 4.1](https://goodlinks.app/releases/4.1/), released on October 12, 2026, added iPhone Duo support. The gallery uses the developer's own Duo press images.

```gallery
{
  "title": "GoodLinks screenshots",
  "images": [
    {
      "src": "/images/blog/best-iphone-duo-apps-goodlinks-duo-reading.png",
      "alt": "GoodLinks article list beside the reader on Duo.",
      "label": "Duo: Reading",
      "caption": "Image: GoodLinks, official Duo press kit.",
      "width": 2853,
      "height": 2007,
      "thumbnail": "/images/blog/best-iphone-duo-apps-goodlinks-duo-reading-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-goodlinks-duo-reading-controls.png",
      "alt": "GoodLinks reading controls on Duo's inner display.",
      "label": "Duo: Reading controls",
      "caption": "Image: GoodLinks, official Duo press kit.",
      "width": 2853,
      "height": 2007,
      "thumbnail": "/images/blog/best-iphone-duo-apps-goodlinks-duo-reading-controls-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-goodlinks-duo-highlights.png",
      "alt": "GoodLinks highlighting controls on Duo's outer display.",
      "label": "Duo: Highlights",
      "caption": "Image: GoodLinks, official Duo press kit.",
      "width": 1398,
      "height": 2034,
      "thumbnail": "/images/blog/best-iphone-duo-apps-goodlinks-duo-highlights-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-goodlinks-duo-notebook.png",
      "alt": "GoodLinks notebook over an article on Duo's inner display.",
      "label": "Duo: Notebook",
      "caption": "Image: GoodLinks, official Duo press kit.",
      "width": 2853,
      "height": 2007,
      "thumbnail": "/images/blog/best-iphone-duo-apps-goodlinks-duo-notebook-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-goodlinks-duo-tags.png",
      "alt": "GoodLinks tags and reading lists on Duo's outer display.",
      "label": "Duo: Tags",
      "caption": "Image: GoodLinks, official Duo press kit.",
      "width": 1398,
      "height": 2034,
      "thumbnail": "/images/blog/best-iphone-duo-apps-goodlinks-duo-tags-thumb.webp"
    }
  ]
}
```

### 3. Why try Tasks for a board that follows the fold?

Tasks makes the fold useful when you move between a board and an individual task. Its official Duo images show one column on the cover, several columns when open, and task cards placed within one half of a partly folded screen. You can inspect a task without losing the board behind it, as the [Tasks press kit](https://thetasks.app/press/) shows.

The developer's [Tasks 5.2 release story](https://thetasks.app/blog/tasks-5-2/), published October 13, 2026, describes keeping the selected column and any half-typed task as the phone folds. The gallery uses five official Duo press compositions.

```gallery
{
  "title": "Tasks: iPhone Duo gallery",
  "images": [
    {
      "src": "/images/blog/best-iphone-duo-apps-tasks-duo-folded-open.png",
      "alt": "Tasks shows one kanban column on the closed Duo and the full board on the inner display.",
      "label": "Duo: Folded open",
      "caption": "Tasks shows one kanban column on the closed Duo and the full board on the inner display. Image: Mustafa Yusuf / Msquare Labs, official iPhone Duo press kit.",
      "width": 4987,
      "height": 2427,
      "thumbnail": "/images/blog/best-iphone-duo-apps-tasks-duo-folded-open-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-tasks-duo-create-task.png",
      "alt": "The task-entry card rests in one half of the partially folded Duo, clear of the crease.",
      "label": "Duo: Create task",
      "caption": "The task-entry card rests in one half of the partially folded Duo, clear of the crease. Image: Mustafa Yusuf / Msquare Labs, official iPhone Duo press kit.",
      "width": 3273,
      "height": 2427,
      "thumbnail": "/images/blog/best-iphone-duo-apps-tasks-duo-create-task-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-tasks-duo-task-detail.png",
      "alt": "A task detail sheet occupies one half of the Duo while its board remains visible beside it.",
      "label": "Duo: Task detail",
      "caption": "A task detail sheet occupies one half of the Duo while its board remains visible beside it. Image: Mustafa Yusuf / Msquare Labs, official iPhone Duo press kit.",
      "width": 3273,
      "height": 2427,
      "thumbnail": "/images/blog/best-iphone-duo-apps-tasks-duo-task-detail-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-tasks-duo-collaboration.png",
      "alt": "Tasks keeps project collaboration controls beside the board on the Duo inner display.",
      "label": "Duo: Collaboration",
      "caption": "Tasks keeps project collaboration controls beside the board on the Duo inner display. Image: Mustafa Yusuf / Msquare Labs, official iPhone Duo press kit.",
      "width": 3273,
      "height": 2427,
      "thumbnail": "/images/blog/best-iphone-duo-apps-tasks-duo-collaboration-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-tasks-duo-settings.png",
      "alt": "Tasks presents Settings alongside the navigation sidebar on the Duo inner display.",
      "label": "Duo: Settings",
      "caption": "Tasks presents Settings alongside the navigation sidebar on the Duo inner display. Image: Mustafa Yusuf / Msquare Labs, official iPhone Duo press kit.",
      "width": 3273,
      "height": 2427,
      "thumbnail": "/images/blog/best-iphone-duo-apps-tasks-duo-settings-thumb.webp"
    }
  ]
}
```

### 4. Why try SuperPlanner for planning with more context?

SuperPlanner puts the schedule and the work inside it together. Open Duo in landscape to see the day beside its summary, or partly fold it to bring an activity's tasks beside or below the timeline. Sectioned lists use two columns, while the outer display keeps the day's schedule within reach, according to the [SuperPlanner press kit](https://superplanner.app/press-kit).

These five developer images show the actual Duo layouts for a daily summary, a list, book and tabletop arrangements, and the outer display. Duo support requires iOS 27.1 or later.

```gallery
{
  "title": "SuperPlanner: iPhone Duo gallery",
  "images": [
    {
      "src": "/images/blog/best-iphone-duo-apps-superplanner-duo-day-summary.png",
      "alt": "The day timeline and Day Summary sit side by side on the open Duo in landscape.",
      "label": "Duo: Day summary",
      "caption": "The day timeline and Day Summary sit side by side on the open Duo in landscape. Image: Gabriel Guarino, official iPhone Duo press kit.",
      "width": 1600,
      "height": 1162,
      "thumbnail": "/images/blog/best-iphone-duo-apps-superplanner-duo-day-summary-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-superplanner-duo-list-columns.png",
      "alt": "A grocery list spreads its sections across two columns on the Duo inner display.",
      "label": "Duo: List columns",
      "caption": "A grocery list spreads its sections across two columns on the Duo inner display. Image: Gabriel Guarino, official iPhone Duo press kit.",
      "width": 1162,
      "height": 1600,
      "thumbnail": "/images/blog/best-iphone-duo-apps-superplanner-duo-list-columns-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-superplanner-duo-book-activity.png",
      "alt": "In the book layout, the current activity and its tasks sit beside the day timeline.",
      "label": "Duo: Book activity",
      "caption": "In the book layout, the current activity and its tasks sit beside the day timeline. Image: Gabriel Guarino, official iPhone Duo press kit.",
      "width": 1600,
      "height": 1162,
      "thumbnail": "/images/blog/best-iphone-duo-apps-superplanner-duo-book-activity-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-superplanner-duo-tabletop-activity.png",
      "alt": "The tabletop layout places the current activity below the timeline while keeping navigation visible.",
      "label": "Duo: Tabletop activity",
      "caption": "The tabletop layout places the current activity below the timeline while keeping navigation visible. Image: Gabriel Guarino, official iPhone Duo press kit.",
      "width": 1162,
      "height": 1600,
      "thumbnail": "/images/blog/best-iphone-duo-apps-superplanner-duo-tabletop-activity-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-superplanner-duo-closed-day.png",
      "alt": "The closed Duo displays the day timeline with controls along the side.",
      "label": "Duo: Closed day",
      "caption": "The closed Duo displays the day timeline with controls along the side. Image: Gabriel Guarino, official iPhone Duo press kit.",
      "width": 1148,
      "height": 1600,
      "thumbnail": "/images/blog/best-iphone-duo-apps-superplanner-duo-closed-day-thumb.webp"
    }
  ]
}
```

### 5. Why try Finalist for planning in different poses?

Finalist makes the way you position Duo part of planning your day. Its developer shows the agenda and timeline together in the book pose, a Desk Clock when propped open, and a wider planner when unfolded. Daily remembers a layout for each screen setup, so your preferred arrangement can return. The developer describes these poses in its [Duo walkthrough](https://www.finalist.works/intentional-phone/) and the [Finalist 4.2 release notes](https://www.finalist.works/4-2/), published October 13, 2026.

These are the developer's own Duo images, showing different screens and poses. They give a more specific picture of the design than a general claim that an app supports a larger screen.

```gallery
{
  "title": "Finalist: five Duo views",
  "images": [
    {
      "src": "/images/blog/best-iphone-duo-apps-finalist-duo-daily.png",
      "alt": "Finalist on a propped iPhone Duo, with a countdown, timeline and notes.",
      "label": "Duo: Daily view",
      "caption": "Developer's Duo screenshot. Image: Finalist.",
      "width": 2000,
      "height": 1414,
      "thumbnail": "/images/blog/best-iphone-duo-apps-finalist-duo-daily-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-finalist-duo-weekly.png",
      "alt": "Finalist showing a weekly planner across the two sides of an open iPhone Duo.",
      "label": "Duo: Weekly planner",
      "caption": "Developer's Duo screenshot. Image: Finalist.",
      "width": 1890,
      "height": 1752,
      "thumbnail": "/images/blog/best-iphone-duo-apps-finalist-duo-weekly-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-finalist-duo-journal.png",
      "alt": "Finalist showing a photo, location map and journal notes on iPhone Duo.",
      "label": "Duo: Journal",
      "caption": "Developer's Duo screenshot. Image: Finalist.",
      "width": 1891,
      "height": 1753,
      "thumbnail": "/images/blog/best-iphone-duo-apps-finalist-duo-journal-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-finalist-duo-day-review.png",
      "alt": "Finalist showing tasks to consider beside the plan for today on iPhone Duo.",
      "label": "Duo: Day Review",
      "caption": "Developer's Duo screenshot. Image: Finalist.",
      "width": 1923,
      "height": 1785,
      "thumbnail": "/images/blog/best-iphone-duo-apps-finalist-duo-day-review-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-finalist-duo-planner-layout.png",
      "alt": "Finalist showing weekly, monthly and yearly planner layout choices on an open iPhone Duo.",
      "label": "Duo: Planner layouts",
      "caption": "Developer's Duo screenshot. Image: Finalist.",
      "width": 2000,
      "height": 1451,
      "thumbnail": "/images/blog/best-iphone-duo-apps-finalist-duo-planner-layout-thumb.webp"
    }
  ]
}
```

### 6. Why try Mercury Weather for comparing places?

Mercury Weather makes the larger display useful when you care about more than one location. Its Duo release notes describe locations alongside the forecast when open, with the familiar phone layout when closed. You can also open two Mercury windows together to compare the weather in two places, according to [Mercury's App Store release notes](https://apps.apple.com/us/app/mercury-weather/id1621800675).

These five official press images show compact and expanded forecasts, light and dark appearances, and Home Screen widgets; the final one is the developer's announcement artwork. Images come from [Mercury's press kit](https://mercuryweather.app/press/).

```gallery
{
  "title": "Mercury Weather: official iPhone Duo press artwork",
  "images": [
    {
      "src": "/images/blog/best-iphone-duo-apps-mercury-duo-light-forecast.png",
      "alt": "Mercury Weather's compact and expanded Duo forecasts in light mode.",
      "label": "Duo: Locations and forecast",
      "caption": "Official Duo press artwork. Image: Triple Glazed Studios.",
      "width": 3840,
      "height": 2160,
      "thumbnail": "/images/blog/best-iphone-duo-apps-mercury-duo-light-forecast-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-mercury-duo-dark-locations.png",
      "alt": "Mercury Weather's dark Duo forecast with its locations sidebar.",
      "label": "Duo: Dark locations",
      "caption": "Official Duo press artwork. Image: Triple Glazed Studios.",
      "width": 3840,
      "height": 2160,
      "thumbnail": "/images/blog/best-iphone-duo-apps-mercury-duo-dark-locations-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-mercury-duo-widgets.png",
      "alt": "Mercury Weather's compact forecast and widgets on Duo's inner Home Screen.",
      "label": "Duo: Weather widgets",
      "caption": "Official Duo press artwork. Image: Triple Glazed Studios.",
      "width": 3840,
      "height": 2160,
      "thumbnail": "/images/blog/best-iphone-duo-apps-mercury-duo-widgets-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-mercury-duo-dark-forecast.png",
      "alt": "Mercury Weather's dark compact and expanded forecasts for two cities.",
      "label": "Duo: Dark forecasts",
      "caption": "Official Duo press artwork. Image: Triple Glazed Studios.",
      "width": 3840,
      "height": 2160,
      "thumbnail": "/images/blog/best-iphone-duo-apps-mercury-duo-dark-forecast-thumb.webp"
    },
    {
      "src": "/images/blog/best-iphone-duo-apps-mercury-duo-announcement.png",
      "alt": "Mercury Weather's Duo announcement with compact and expanded forecasts.",
      "label": "Duo: Announcement artwork",
      "caption": "Developer announcement artwork. Image: Triple Glazed Studios.",
      "width": 3840,
      "height": 2160,
      "thumbnail": "/images/blog/best-iphone-duo-apps-mercury-duo-announcement-thumb.webp"
    }
  ]
}
```

### Which app should you try first?

Start with a task you already do. PageCrawl keeps a website change beside its context, GoodLinks brings a reading list alongside an article, and Tasks opens a whole project board. SuperPlanner and Finalist offer different ways to plan a day. Mercury Weather brings forecasts together.

For PageCrawl, open **Timeline**, choose a change and compare the compact and expanded views. Notice how the selected row, summary and actual differences stay connected. Those small design decisions are what make a larger screen useful during a real review.

The other apps are described from linked developer documentation and official Duo images. We have not tested their Duo experiences hands-on. Check each app's current listing and release notes for feature availability in your region.

---

Need more? The complete PageCrawl.io help center, with every article, is available as a single document at https://pagecrawl.io/llms-full.txt. Read it for context on anything this page does not cover.