# Osmo ABCs vs Build

The clearest difference is rating: Build at 4.7 against Osmo ABCs's 3.7. Build also leads on monetization model (free vs free with in-app purchases) and update cadence (fortnightly vs every 6 weeks). Osmo ABCs's advantage is ratings volume (260 vs 3) and iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Build holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Osmo ABCs has 260 ratings behind it against 3, so its average is the more settled of the two.

Osmo ABCs ships an update every 6 weeks, Build fortnightly. The most recent releases landed on September 19, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Osmo ABCs | Build |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (260 ratings)](https://appshunter.io/ios/app/osmo-abcs/id1439615379/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/build-a-math/id1521174530/reviews)** |
| Number of ratings | **260** | 3 |
| Positive reviews | 18.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 842 MB | 1 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tangible Play](https://appshunter.io/developer/799157444) | [Weiran Ye](https://appshunter.io/developer/481592104) |

## What reviewers say

### Osmo ABCs

[App page](https://appshunter.io/ios/app/osmo-abcs/id1439615379)

Engage young learners in a hands-on adventure to build pre-reading skills. Through interactive play with a friendly monster, children develop confidence in letter recognition, phonics, and vocabulary. This app requires physical Osmo pieces and a compatible iPhone or iPad.

**Highlights:** Letter recognition, Phonics learning, Vocabulary building, Over 300 words, Hands-on play, Interactive adventure

**In-app purchases:** none

**What reviewers like**

- 😃 Amazing game
- 💖 Love it so much
- ✨ So much fun
- 👍 Great app for kids
- 💯 Everything is spot on

**What reviewers complain about**

- ❌ Not compatible with iPad Pro
- ❌ Not receiving verification code
- ❌ Faulty readings
- ❌ Unusable like this
- ❌ Not playable

**Reported bugs**

- Not compatible with iPad Pro
- Not receiving verification code
- Faulty readings (wrong tile detection)
- Camera orientation issues on newer iPads
- App won't open for some users

**Requested features**

- Update app for newer iPads
- Fix ABC game redirection to App Store
- Fix audio issues


### Build

[App page](https://appshunter.io/ios/app/build-a-math/id1521174530)

This app offers short, focused math drills for addition, subtraction, multiplication, and division. It provides instant feedback and tracks progress through engaging sessions designed for quick practice.

**Highlights:** Short, focused math practice sessions, Master addition, subtraction, multiplication, division, Instant feedback with haptics, color, and sound, Smart question rotation for confidence, Progress tracking and summaries, Works offline, no ads, no accounts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Osmo ABCs free?

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

### Is Build free?

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

### Which has better reviews, Osmo ABCs or Build?

Build is rated higher. Osmo ABCs averages 3.7 out of 5 from 260 ratings, while Build averages 4.7 from 3 ratings.

### Do Osmo ABCs or Build have ads?

Neither Osmo ABCs nor Build shows ads.

### Which is updated more often, Osmo ABCs or Build?

Osmo ABCs ships an update every 6 weeks, and Build fortnightly. Most recently, Osmo ABCs was updated on September 19, 2026 and Build on June 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.*