# cullstudio vs cairn

The clearest difference is in-app purchases: cairn at none against cullstudio's 4. cairn also leads on iOS requirement (17.0 vs 26.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. cullstudio sells 4 in-app purchases, starting at $3.99 per 7 days. cairn asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for cullstudio against 5.0 for cairn. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 26, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | cullstudio | cairn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/cullstudio/id6753145956/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/cairn-immich-sync/id6763392945/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Freemium | **Free** |
| Size | 11 MB | 8 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NILS NEUHAUS](https://appshunter.io/developer/1842696037) | [Graham Larue](https://appshunter.io/developer/1873829108) |

## What reviewers say

### cullstudio

[App page](https://appshunter.io/ios/app/cullstudio/id6753145956)

Quickly identify your best photos from large batches without distraction. This tool offers fast RAW handling, side-by-side comparisons, and offline functionality. Enhance your workflow with advanced filtering and AI-driven organization options.

**Highlights:** Ultra-fast RAW handling, Side-by-side photo comparison, Offline functionality, AI-driven grouping and sorting, Advanced filtering options, Accept/Reject workflow

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $39.99 | per year |
| cullstudio 2025 | $89.99 | one-time |


### cairn

[App page](https://appshunter.io/ios/app/cairn-immich-sync/id6763392945)

This app synchronizes your iPhone photo library with your Immich server. It automatically moves photos deleted from your phone to your Immich trash, ensuring consistency. The app prioritizes safety with features like a quarantine window and trash-to-restore functionality.

**Highlights:** Syncs iPhone deletions to Immich, Moves deleted photos to Immich Trash, Configurable quarantine window, Trash-to-restore functionality, Percent cap and floor for safety, Exclusion options for specific photos, Restrict indexing to specific albums

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

**In-app purchases:** none


## Frequently asked questions

### Is cullstudio free?

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

### Is cairn free?

cairn is free to download, with no in-app purchases.

### Which has better reviews, cullstudio or cairn?

cullstudio and cairn are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do cullstudio or cairn have ads?

Neither cullstudio nor cairn shows ads.

### Which is updated more often, cullstudio or cairn?

cullstudio ships an update weekly, and cairn weekly. Most recently, cullstudio was updated on September 26, 2026 and cairn on October 15, 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.*