# A vs ∫dx

The clearest difference is in-app purchases: A at none against ∫dx's 2. A also leads on iOS requirement (10.0 vs 15.1). ∫dx's advantage is ads (none vs shown) and update cadence (monthly vs every 15 months). On price and device support there is nothing between them.

Both are free to download. ∫dx sells 2 in-app purchases, starting at $4.99 per month. A asks for nothing beyond the download.

A ships an update every 15 months, ∫dx monthly. The most recent releases landed on September 17, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | A | ∫dx |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 15 months | **Monthly** |
| Size | 20 MB | 42 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Saman Wijenayake](https://appshunter.io/developer/1553615257) | [PRANEEL AGRAWAL](https://appshunter.io/developer/1868893039) |

## What reviewers say

### A

[App page](https://appshunter.io/ios/app/a-level-computer-flashcards/id1624450460)

**Features:** macOS Compatibility

**In-app purchases:** none


### ∫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 A free?

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

### Is ∫dx free?

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

### Do A or ∫dx have ads?

A shows ads; ∫dx does not.

### Which is updated more often, A or ∫dx?

A ships an update every 15 months, and ∫dx monthly. Most recently, A was updated on September 17, 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.*