# DouOS vs OnceDone

The clearest difference is in-app purchases: DouOS at none against OnceDone's 1. OnceDone's advantage is iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. OnceDone sells 1 one-off in-app purchase. DouOS asks for nothing beyond the download.

## The numbers

| Metric | DouOS | OnceDone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/douos/id6773022070/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 68 MB | 29 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, Mac | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [晓晗 宿](https://appshunter.io/developer/1868332765) | [晨飞 赵](https://appshunter.io/developer/6775203515) |

## What reviewers say

### DouOS

[App page](https://appshunter.io/ios/app/douos/id6773022070)

An AI friend that chats with you, remembers important details, and helps organize your thoughts and inspirations. It's designed to be a companion rather than a tool, offering a conversational experience for daily reflections and ideas.

**Highlights:** Conversational AI chat, Remembers user preferences and states, Organizes conversations, inspirations, and emotions, Supports voice, images, files, and stickers, User-controlled data management, Long-term companionship

**Features:** Vision Pro support

**In-app purchases:** none


### OnceDone

[App page](https://appshunter.io/ios/app/oncedone/id6790204894)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OnceDone Lifetime Pro | $6.99 | one-time |


## Frequently asked questions

### Is DouOS free?

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

### Is OnceDone free?

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

### Do DouOS or OnceDone have ads?

Neither DouOS nor OnceDone shows ads.

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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.*