# Derdy vs MathTalk

The clearest difference is update cadence: Derdy at weekly against MathTalk's every 2 weeks. Derdy also leads on iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Derdy sells 2 in-app purchases, starting at $2.99 per month and MathTalk sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Derdy ships an update weekly, MathTalk every 2 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | Derdy | MathTalk |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 84 MB | 34 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Mohamed Amine Kouki](https://appshunter.io/developer/1853049655) | [Serdar KULEK](https://appshunter.io/developer/1859996062) |

## What reviewers say

### Derdy

[App page](https://appshunter.io/ios/app/derdy-learn-german-articles/id6755308710)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $2.99 | per month |
| Yearly Premium Subscription | $14.99 | per year |


### MathTalk

[App page](https://appshunter.io/ios/app/mathtalk-yks-lgs-solver/id6756312927)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathTalk Monthly Subscription | $6.99 | per month |
| MathTalk Premium Yearly | $69.99 | per year |


## Frequently asked questions

### Is Derdy free?

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

### Is MathTalk free?

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

### Do Derdy or MathTalk have ads?

Neither Derdy nor MathTalk shows ads.

### Which is updated more often, Derdy or MathTalk?

Derdy ships an update weekly, and MathTalk every 2 weeks. Most recently, Derdy was updated on October 30, 2026 and MathTalk on October 30, 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.*