# Math Learner vs 100 Butterflies Encyclopedia

The clearest difference is update cadence: 100 Butterflies Encyclopedia at every 6 days against Math Learner's every 4 months. Math Learner's advantage is iOS requirement (18.6 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Math Learner sells 3 in-app purchases, starting at $2.99 per 7 days and 100 Butterflies Encyclopedia sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Math Learner ships an update every 4 months, 100 Butterflies Encyclopedia every 6 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | Math Learner | 100 Butterflies Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Size | 31 MB | 88 MB |
| Requires iOS | **18.6** | 26.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tilak Shakya](https://appshunter.io/developer/1823223726) | [Sami Kuribara](https://appshunter.io/developer/1891970492) |

## What reviewers say

### Math Learner

[App page](https://appshunter.io/ios/app/math-learner-fun-brain-games/id6757360456)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Leaner Weekly Pro | $2.99 | per 7 days |
| Math Leaner Yearly Pro | $19.99 | per year |
| Lifetime Premium | $29.99 | one-time |


### 100 Butterflies Encyclopedia

[App page](https://appshunter.io/ios/app/100-butterflies-encyclopedia/id6762500216)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - All 100 Butterflies | $3.99 | one-time |


## Frequently asked questions

### Is Math Learner free?

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

### Is 100 Butterflies Encyclopedia free?

100 Butterflies Encyclopedia is free to download, with in-app purchases available.

### Do Math Learner or 100 Butterflies Encyclopedia have ads?

Neither Math Learner nor 100 Butterflies Encyclopedia shows ads.

### Which is updated more often, Math Learner or 100 Butterflies Encyclopedia?

Math Learner ships an update every 4 months, and 100 Butterflies Encyclopedia every 6 days. Most recently, Math Learner was updated on October 28, 2026 and 100 Butterflies Encyclopedia on October 28, 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.*