# Chartivate vs Didu

The clearest difference is in-app purchases: Chartivate at none against Didu's 1. Chartivate also leads on iOS requirement (12.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Didu sells 1 in-app purchase, starting at $19.99 per year. Chartivate asks for nothing beyond the download.

Chartivate ships an update weekly, Didu every 10 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | Chartivate | Didu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Size | 43 MB | 62 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SIMPLER MARKETS LIMITED](https://appshunter.io/developer/1769798607) | [Didu Labs ApS](https://appshunter.io/developer/1832429666) |

## What reviewers say

### Chartivate

[App page](https://appshunter.io/ios/app/chartivate/id6705130720)

**In-app purchases:** none


### Didu

[App page](https://appshunter.io/ios/app/didu-did-you-know/id6749845814)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Didu Annual | $19.99 | per year |


## Frequently asked questions

### Is Chartivate free?

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

### Is Didu free?

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

### Do Chartivate or Didu have ads?

Neither Chartivate nor Didu shows ads.

### Which is updated more often, Chartivate or Didu?

Chartivate ships an update weekly, and Didu every 10 days. Most recently, Chartivate was updated on October 30, 2026 and Didu 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.*