# Study AI vs Didactus

The clearest difference is update cadence: Study AI at every 4 days against Didactus's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Study AI sells 6 in-app purchases, starting at $6.99 per 7 days and Didactus sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Study AI ships an update every 4 days, Didactus every 6 weeks. Both last shipped on October 14, 2026.

## The numbers

| Metric | Study AI | Didactus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/study-ai-homework-helper/id6475925878/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 35 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [聪 杭](https://appshunter.io/developer/1716850832) | [KEITH MICHAEL BLEVINS](https://appshunter.io/developer/1872107809) |

## What reviewers say

### Study AI

[App page](https://appshunter.io/ios/app/study-ai-homework-helper/id6475925878)

This app uses AI to help students understand complex subjects, solve math problems, and improve writing. It offers 24/7 AI support for academic queries and acts as a resource for students, educators, and scholars.

**Highlights:** AI-powered subject comprehension, Scan textbook problems, 24/7 AI academic support, Math problem assistance, Grammar checking, Up-to-date information

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Study AI - Weekly | $6.99 | per 7 days |
| Study AI - Weekly | $9.99 | per 7 days |
| Study AI - Monthly | $19.99 | per month |
| Study AI - Yearly | $34.99 | per year |
| Study AI - Yearly | $59.90 | per year |
| Study AI - Yearly | $59.99 | per year |


### Didactus

[App page](https://appshunter.io/ios/app/didactus/id6758306095)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LVN NCLEX Module | $39.99 | one-time |
| Registered Nurse NCLEX Prep | $69.99 | one-time |


## Frequently asked questions

### Is Study AI free?

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

### Is Didactus free?

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

### Do Study AI or Didactus have ads?

Neither Study AI nor Didactus shows ads.

### Which is updated more often, Study AI or Didactus?

Study AI ships an update every 4 days, and Didactus every 6 weeks. Most recently, Study AI was updated on October 14, 2026 and Didactus on October 14, 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.*