# AskSia vs Otto Math

The clearest difference is iOS requirement: AskSia at 16.4 against Otto Math's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. AskSia sells 7 in-app purchases, starting at $5.99 per 7 days and Otto Math sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

AskSia ships an update weekly, Otto Math every 9 days. The most recent releases landed on October 30, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | AskSia | Otto Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (67 ratings)](https://appshunter.io/ios/app/asksia-ai-tutor-and-notes-study/id6746232496/reviews)** | — |
| Number of ratings | **67** | — |
| Positive reviews | 83.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 7 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [ASKSIA INC](https://appshunter.io/developer/1815883382) | [Krzysztof Guz](https://appshunter.io/developer/1463664836) |

## What reviewers say

### AskSia

[App page](https://appshunter.io/ios/app/asksia-ai-tutor-and-notes-study/id6746232496)

This AI-powered study tool helps students upload readings, transcribe lectures, ask questions, and organize notes. It offers a free tier with limited features and multiple premium subscription plans for enhanced capabilities and unlimited processing.

**Highlights:** Upload readings and documents, Transcribe lecture audio, Ask AI questions about content, Organize notes, Unlimited AI assistance (premium), Document processing (premium)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AskSia - A+ | $5.99 | per 7 days |
| AskSia - Plus | $14.99 | per month |
| AskSia - Super | $17.99 | per month |
| AskSia - A+ | $29.99 | per month |
| AskSia - Plus | $99.99 | per year |
| AskSia - Super | $143.99 | per year |
| AskSia - A+ | $155.99 | per year |


### Otto Math

[App page](https://appshunter.io/ios/app/otto-math-learn-and-play/id6819278668)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otto Plus Monthly | $2.99 | per month |
| Otto Plus Annual | $19.99 | per year |
| Otto Plus Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is AskSia free?

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

### Is Otto Math free?

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

### Do AskSia or Otto Math have ads?

Neither AskSia nor Otto Math shows ads.

### Which is updated more often, AskSia or Otto Math?

AskSia ships an update weekly, and Otto Math every 9 days. Most recently, AskSia was updated on October 30, 2026 and Otto Math on October 26, 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.*