# Allister vs Viewer for Trello

The clearest difference is update cadence: Viewer for Trello at every 4 days against Allister's every 3 weeks. Viewer for Trello also leads on iOS requirement (16.0 vs 26.0). Allister's advantage is device support (5 vs 2). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Allister sells 3 in-app purchases, starting at $2.99 per month and Viewer for Trello sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Allister ships an update every 3 weeks, Viewer for Trello every 4 days. The most recent releases landed on November 6, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Allister | Viewer for Trello |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/allister/id1300317567/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 90.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 198 MB | 2 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch** | iPhone, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Valerio Lo Giudice](https://appshunter.io/developer/469896761) | [Appic Ltd.](https://appshunter.io/developer/984875987) |

## What reviewers say

### Allister

[App page](https://appshunter.io/ios/app/allister/id1300317567)

Manage all your tasks and to-do lists in one place. Organize personal and professional projects with customizable lists, smart grouping, and real-time collaboration. Set reminders, attach files, and access your data offline.

**Highlights:** Unlimited lists and tasks, Smart list grouping, Shared lists for collaboration, Location-based reminders, File and media attachments, Siri integration, Offline access and sync

**Features:** Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Semi Annual | $12.99 | per 6 months |
| Annual | $19.99 | per year |


### Viewer for Trello

[App page](https://appshunter.io/ios/app/viewer-for-trello/id1548761411)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Board Access | $4.99 | one-time |


## Frequently asked questions

### Is Allister free?

Allister is free to download, with in-app purchases available.

### Is Viewer for Trello free?

Viewer for Trello is free to download, with in-app purchases available.

### Do Allister or Viewer for Trello have ads?

Neither Allister nor Viewer for Trello shows ads.

### Which is updated more often, Allister or Viewer for Trello?

Allister ships an update every 3 weeks, and Viewer for Trello every 4 days. Most recently, Allister was updated on November 6, 2026 and Viewer for Trello on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*