# OnDevice AI vs Prysm AI

The clearest difference is in-app purchases: Prysm AI at none against OnDevice AI's 1. Prysm AI also leads on update cadence (every 2 days vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OnDevice AI sells 1 one-off in-app purchase. Prysm AI asks for nothing beyond the download.

OnDevice AI ships an update every 6 months, Prysm AI every 2 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | OnDevice AI | Prysm AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 days** |
| Size | 6 MB | 2 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Florin Valentin Micu](https://appshunter.io/developer/1809245808) | [Andrew Bierman](https://appshunter.io/developer/1742901425) |

## What reviewers say

### OnDevice AI

[App page](https://appshunter.io/ios/app/ondevice-ai/id6752406563)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro Features | $29.99 | one-time |


### Prysm AI

[App page](https://appshunter.io/ios/app/prysm-ai/id6754121721)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OnDevice AI free?

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

### Is Prysm AI free?

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

### Do OnDevice AI or Prysm AI have ads?

Neither OnDevice AI nor Prysm AI shows ads.

### Which is updated more often, OnDevice AI or Prysm AI?

OnDevice AI ships an update every 6 months, and Prysm AI every 2 days. Most recently, OnDevice AI was updated on October 30, 2026 and Prysm AI on October 30, 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.*