# Study Buddy | AI Assistant vs ∫dx

The clearest difference is update cadence: ∫dx at monthly against Study Buddy | AI Assistant's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Study Buddy | AI Assistant sells 2 one-off in-app purchases and ∫dx sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Study Buddy | AI Assistant ships an update every 6 months, ∫dx monthly. The most recent releases landed on September 11, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Study Buddy | AI Assistant | ∫dx |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Size | 156 MB | 42 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Urav Advanced Learning Systems Private Limited](https://appshunter.io/developer/1767137834) | [PRANEEL AGRAWAL](https://appshunter.io/developer/1868893039) |

## What reviewers say

### Study Buddy | AI Assistant

[App page](https://appshunter.io/ios/app/study-buddy-ai-assistant/id6671574219)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 TalkTime | $5.99 | one-time |
| Promo TalkTime | $5.99 | one-time |


### ∫dx

[App page](https://appshunter.io/ios/app/dx-a-level-maths-practice/id6758026965)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| dx Premium Monthly | $4.99 | per month |
| dx Premium Annual | $12.99 | per year |


## Frequently asked questions

### Is Study Buddy | AI Assistant free?

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

### Is ∫dx free?

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

### Do Study Buddy | AI Assistant or ∫dx have ads?

Neither Study Buddy | AI Assistant nor ∫dx shows ads.

### Which is updated more often, Study Buddy | AI Assistant or ∫dx?

Study Buddy | AI Assistant ships an update every 6 months, and ∫dx monthly. Most recently, Study Buddy | AI Assistant was updated on September 11, 2026 and ∫dx on September 6, 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.*