# proof vs RedSum

The clearest difference is in-app purchases: RedSum at none against proof's 6. proof's advantage is update cadence (every 9 days vs every 5 weeks) and iOS requirement (18.2 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. proof sells 6 one-off in-app purchases. RedSum asks for nothing beyond the download.

proof ships an update every 9 days, RedSum every 5 weeks. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | proof | RedSum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/proof-the-rare-camera/id6749852395/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 35 MB |
| Requires iOS | **18.2** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 9+ | 4+ |
| Developer | [One Last LLC](https://appshunter.io/developer/1801042901) | [Joao Valente](https://appshunter.io/developer/1689831331) |

## What reviewers say

### proof

[App page](https://appshunter.io/ios/app/proof-the-rare-camera/id6749852395)

Challenge an AI to identify rare subjects through your camera. With a limited number of daily shots and no filters or likes, compete against friends and the world to achieve the highest rarity score and win.

**Highlights:** AI rarity scoring, Limited daily shots, No filters or likes, Competitive daily pool, Global leaderboards

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Shot | $0.99 | one-time |
| 3 Shots | $0.99 | one-time |
| 3 Shots | $1.99 | one-time |
| 7 Shots | $1.99 | one-time |
| 5 Shots | $2.99 | one-time |
| 15 Shots | $2.99 | one-time |


### RedSum

[App page](https://appshunter.io/ios/app/redsum/id6757315148)

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

**In-app purchases:** none


## Frequently asked questions

### Is proof free?

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

### Is RedSum free?

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

### Do proof or RedSum have ads?

Neither proof nor RedSum shows ads.

### Which is updated more often, proof or RedSum?

proof ships an update every 9 days, and RedSum every 5 weeks. Most recently, proof was updated on September 25, 2026 and RedSum on September 24, 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.*