# Graylin vs OS One

The clearest difference is iOS requirement: Graylin at 15.1 against OS One's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Graylin sells 10 in-app purchases, starting at $34.99 per month and OS One sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Graylin ships an update every 3 days, OS One every 4 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Graylin | OS One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/os-one/id6760207862/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | — | Freemium |
| Size | 42 MB | 65 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [GRAYLIN AI (PTY) LTD](https://appshunter.io/developer/1872989548) | [Human Interface Design LLC](https://appshunter.io/developer/1078749730) |

## What reviewers say

### Graylin

[App page](https://appshunter.io/ios/app/graylin/id6759706980)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Graylin Starter | $34.99 | per month |
| Graylin Pro | $57.99 | per month |
| Graylin Team | $114.99 | per month |
| Graylin Starter Year | $219.99 | per year |
| Graylin Pro Year | $579.99 | per year |
| Graylin Team Year | $1000.00 | per year |
| 5 AI Credits | $5.99 | one-time |
| 10 AI Credits | $11.99 | one-time |
| 25 AI Credits | $29.99 | one-time |
| 50 AI Credits | $59.99 | one-time |


### OS One

[App page](https://appshunter.io/ios/app/os-one/id6760207862)

This personal agent assists with chat, content creation, and app integration. It can generate images and videos, search the web, and manage tasks through a conversational interface. Advanced features require a subscription after initial free examples.

**Highlights:** AI chat and reasoning, Image and video generation, Web and X search, App integrations, Voice and podcast modes, Live Activities tracking

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic | $4.99 | per month |
| Pro | $19.99 | per month |
| Max | $99.99 | per month |


## Frequently asked questions

### Is Graylin free?

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

### Is OS One free?

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

### Do Graylin or OS One have ads?

Neither Graylin nor OS One shows ads.

### Which is updated more often, Graylin or OS One?

Graylin ships an update every 3 days, and OS One every 4 days. Most recently, Graylin was updated on October 28, 2026 and OS One on October 31, 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.*