# Saner.AI vs Duo Viewer

The clearest difference is iOS requirement: Saner.AI at 18.6 against Duo Viewer's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Saner.AI sells 4 in-app purchases, starting at $12.00 per month and Duo Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Saner.AI | Duo Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Freemium | — |
| Size | 73 MB | 2 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | +4 | 17+ |
| Developer | [Saner.AI](https://appshunter.io/developer/1781843601) | [Liangjun Song](https://appshunter.io/developer/6816411623) |

## What reviewers say

### Saner.AI

[App page](https://appshunter.io/ios/app/sanerai/id6738684403)

This AI-powered productivity assistant helps individuals with ADHD organize notes, prioritize tasks, and synthesize information from various digital sources. It offers a distraction-free interface and an integrated personal knowledge assistant to recall and process your ideas.

**Highlights:** AI-powered organization and prioritization, Synthesizes insights from notes and tasks, Integrates with Email, Drive, Slack, Personal knowledge assistant (Skai), Universal task management, Distraction-free interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter | $12.00 | per month |
| Standard | $20.00 | per month |
| Starter | $96.00 | per year |
| Standard | $191.99 | per year |


### Duo Viewer

[App page](https://appshunter.io/ios/app/duo-viewer/id6816411621)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duo Viewer Pro | $6.99 | one-time |


## Frequently asked questions

### Is Saner.AI free?

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

### Is Duo Viewer free?

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

### Do Saner.AI or Duo Viewer have ads?

Neither Saner.AI nor Duo Viewer 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.*