# AI Notes For iPhone vs GemTrail

The clearest difference is update cadence: GemTrail at every 6 weeks against AI Notes For iPhone's every 4 months. AI Notes For iPhone's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AI Notes For iPhone ships an update every 4 months, GemTrail every 6 weeks. The most recent releases landed on November 9, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | AI Notes For iPhone | GemTrail |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 4 MB | 51 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thi Quynh Nhung Cao](https://appshunter.io/developer/1854040975) | [BYTECRAFTERSLIMITED](https://appshunter.io/developer/6786246578) |

## What reviewers say

### AI Notes For iPhone

[App page](https://appshunter.io/ios/app/ai-notes-for-iphone/id6760284798)

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

**In-app purchases:** none


### GemTrail

[App page](https://appshunter.io/ios/app/gemtrail-rock-identifier/id6786246576)

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

**In-app purchases:** none


## Frequently asked questions

### Is AI Notes For iPhone free?

AI Notes For iPhone is free to download, with no in-app purchases.

### Is GemTrail free?

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

### Do AI Notes For iPhone or GemTrail have ads?

Neither AI Notes For iPhone nor GemTrail shows ads.

### Which is updated more often, AI Notes For iPhone or GemTrail?

AI Notes For iPhone ships an update every 4 months, and GemTrail every 6 weeks. Most recently, AI Notes For iPhone was updated on November 9, 2026 and GemTrail on October 25, 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.*