# Letzlearn vs IDK

The clearest difference is in-app purchases: IDK at none against Letzlearn's 1. IDK also leads on iOS requirement (15.1 vs 17). Letzlearn's advantage is update cadence (every 3 days vs weekly). On price, ads and device support there is nothing between them.

Both are free to download. Letzlearn sells 1 one-off in-app purchase. IDK asks for nothing beyond the download.

Letzlearn ships an update every 3 days, IDK weekly. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Letzlearn | IDK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Size | 71 MB | 75 MB |
| Requires iOS | 17 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Francoise Nilles](https://appshunter.io/developer/1800401679) | [I Don't Know Yet (LU)](https://appshunter.io/developer/1832194918) |

## What reviewers say

### Letzlearn

[App page](https://appshunter.io/ios/app/letzlearn/id6742870499)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Letzlearn Premium | $8.99 | one-time |


### IDK

[App page](https://appshunter.io/ios/app/idk-yet/id6751079556)

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

**In-app purchases:** none


## Frequently asked questions

### Is Letzlearn free?

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

### Is IDK free?

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

### Do Letzlearn or IDK have ads?

Neither Letzlearn nor IDK shows ads.

### Which is updated more often, Letzlearn or IDK?

Letzlearn ships an update every 3 days, and IDK weekly. Most recently, Letzlearn was updated on October 6, 2026 and IDK 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.*