# LetterSchool vs Num Fu

The clearest difference is rating: LetterSchool at 4.5 against Num Fu's 3.8. LetterSchool also leads on ratings volume (17K vs 4) and review sentiment (55% vs 33%). Num Fu's advantage is in-app purchases (none vs 10) and iOS requirement (6.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. LetterSchool sells 10 in-app purchases, starting at $4.99 per month. Num Fu asks for nothing beyond the download.

LetterSchool holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: LetterSchool has 17K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 55% of LetterSchool's written reviews are positive against 33% of Num Fu's.

LetterSchool ships an update every 2 months, Num Fu every 3 months. The most recent releases landed on November 12, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | LetterSchool | Num Fu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (17K ratings)](https://appshunter.io/ios/app/letterschool-learn-to-write/id481067676/reviews)** | [3.8 (4 ratings)](https://appshunter.io/ios/app/num-fu-addition/id981031137/reviews) |
| Number of ratings | **17K** | 4 |
| Positive reviews | **54.5% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 158 MB | 224 MB |
| Requires iOS | 15.0 | **6.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Letterschool Enabling Learning B.V.](https://appshunter.io/developer/1133082101) | [ORIGO Education](https://appshunter.io/developer/693416241) |

## What reviewers say

### LetterSchool

[App page](https://appshunter.io/ios/app/letterschool-learn-to-write/id481067676)

This app helps young children learn to write letters, numbers, and shapes through interactive tracing and spelling games. It offers progress tracking and engaging animations to make learning fun and effective for toddlers and preschoolers.

**Highlights:** Block and cursive letter tracing, Uppercase and lowercase letters, Number tracing (1-10), Geometric shape tracing, Word spelling and phonics, Progress tracking for multiple players, Interactive animations and sound effects

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access Pass | $4.99 | per month |
| Monthly Access Pass | $9.99 | per month |
| Quarterly Access Pass | $12.99 | per 3 months |
| Quarterly Access Pass | $19.99 | per 3 months |
| Annual Access Pass | $44.99 | per year |
| Yearly Access Pass | $59.99 | per year |
| Unlock All Shapes | $2.99 | one-time |
| Unlock Full Block Alphabet | $6.99 | one-time |
| Unlock Full Cursive Alphabet | $6.99 | one-time |
| All-in-one Package | $79.99 | one-time |

**What reviewers like**

- 👍 Engaging and interactive
- 🚀 Helps improve handwriting
- 💡 Supports multiple writing styles (print, cursive, d'nealian)
- 👍 Motivating with rewards and animations
- 👍 Useful for children with learning challenges

**What reviewers complain about**

- 🐛 Subscription issues (app reverts to lite version, need to restore purchases)
- 🐛 Glitches and crashes (especially with Dari letters)
- 💰 Expensive subscription model
- 🔍 Limited free version
- 🔍 Inconsistent letter formation (not aligned with school standards)

**Reported bugs**

- Dari letter (پ) keeps glitching
- Subscription issues (app reverts to lite version, need to restore purchases)
- Incompatibility with older devices
- Login screen freezes

**Requested features**

- Add more languages (Russian, Serbian, Thai, Korean, Hebrew, Hindi, etc.)
- Allow creating custom words/names to practice
- Improve letter sound pronunciations
- Add more visual options (fonts, themes, etc.)
- Integrate with International Phonetic Alphabet


### Num Fu

[App page](https://appshunter.io/ios/app/num-fu-addition/id981031137)

Master basic addition facts through engaging educational games. This app utilizes proven addition strategies to help students build number sense and fluency in a fun, interactive way.

**Highlights:** Addition fact practice, ORIGO Education strategies, Fun educational games, Number sense development, Mastery of math facts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LetterSchool free?

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

### Is Num Fu free?

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

### Which has better reviews, LetterSchool or Num Fu?

LetterSchool is rated higher. LetterSchool averages 4.5 out of 5 from 17K ratings, while Num Fu averages 3.8 from 4 ratings.

### Do LetterSchool or Num Fu have ads?

Neither LetterSchool nor Num Fu shows ads.

### Which is updated more often, LetterSchool or Num Fu?

LetterSchool ships an update every 2 months, and Num Fu every 3 months. Most recently, LetterSchool was updated on November 12, 2026 and Num Fu on November 1, 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.*