# Square Panda Letter Lullaby vs Osmo Math Buzz

The clearest difference is in-app purchases: Square Panda Letter Lullaby at none against Osmo Math Buzz's 2. Square Panda Letter Lullaby also leads on iOS requirement (8.0 vs 15.0). Osmo Math Buzz's advantage is ratings volume (143 vs 10) and review sentiment (13% vs 0%). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Osmo Math Buzz sells 2 one-off in-app purchases. Square Panda Letter Lullaby asks for nothing beyond the download.

Square Panda Letter Lullaby holds the better App Store score, 3.2 against 3.0. That said, the two scores are not equally well evidenced: Osmo Math Buzz has 143 ratings behind it against 10, so its average is the more settled of the two. Written reviews complicate that: 0% of Square Panda Letter Lullaby's written reviews are positive against 13% of Osmo Math Buzz's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 2, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Square Panda Letter Lullaby | Osmo Math Buzz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (10 ratings)](https://appshunter.io/ios/app/square-panda-letter-lullaby/id1157733021/reviews)** | [3.0 (143 ratings)](https://appshunter.io/ios/app/osmo-math-buzz/id1504177111/reviews) |
| Number of ratings | 10 | **143** |
| Positive reviews | 0.0% of reviews | **13.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 263 MB | 264 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Square Panda Inc.](https://appshunter.io/developer/1088414097) | [Tangible Play](https://appshunter.io/developer/799157444) |

## What reviewers say

### Square Panda Letter Lullaby

[App page](https://appshunter.io/ios/app/square-panda-letter-lullaby/id1157733021)

Children create their own alphabet songs by arranging letters, experiencing tactile reinforcement and multi-sensory engagement. This app offers two modes: one for song creation and another for reviewing new words learned, bringing their unique lullabies to life.

**Highlights:** Customizable alphabet songs, Tactile letter reinforcement, Multi-sensory learning, Word review mode, Phonics and vocabulary building, Contextual word reinforcement with pictures

**Features:** macOS Compatibility

**In-app purchases:** none


### Osmo Math Buzz

[App page](https://appshunter.io/ios/app/osmo-math-buzz/id1504177111)

Engage in collaborative math practice with up to four players, solving equations to overcome challenges and collect rewards. Designed for children aged 6-10, this app transforms screen time into hands-on learning through interactive play.

**Highlights:** Team-based math practice, Addition, subtraction, multiplication, Collaborative play, Hands-on learning system, Ages 6-10, Tangible play with digital learning

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-day trial of Math Buzz | Free | one-time |
| Unlock Math Buzz | $24.99 | one-time |

**What reviewers like**

- 👍 Fun and engaging gameplay
- 💡 Teaches numbers and strategy
- 🤝 Good for multiplayer
- 💰 Nice price (for some)
- 🧠 Challenges children

**What reviewers complain about**

- 🐛 Freezes on startup
- 🐛 App won't load
- 🐛 Crashes mid-game
- 🐛 Progress lost on crash
- 🐛 Unreliable login

**Reported bugs**

- App freezes on Osmo logo
- App does not load
- App crashes during gameplay
- Lost progress after crashes
- Login issues and purchase restoration problems

**Requested features**

- Fix the app loading issue
- Improve app stability
- Make the game more engaging
- Provide clearer instructions
- Ensure progress is saved


## Frequently asked questions

### Is Square Panda Letter Lullaby free?

Square Panda Letter Lullaby is free to download, with no in-app purchases.

### Is Osmo Math Buzz free?

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

### Which has better reviews, Square Panda Letter Lullaby or Osmo Math Buzz?

Square Panda Letter Lullaby is rated higher. Square Panda Letter Lullaby averages 3.2 out of 5 from 10 ratings, while Osmo Math Buzz averages 3.0 from 143 ratings.

### Do Square Panda Letter Lullaby or Osmo Math Buzz have ads?

Neither Square Panda Letter Lullaby nor Osmo Math Buzz shows ads.

### Which is updated more often, Square Panda Letter Lullaby or Osmo Math Buzz?

Square Panda Letter Lullaby ships an update every 2 months, and Osmo Math Buzz every 2 months. Most recently, Square Panda Letter Lullaby was updated on October 2, 2026 and Osmo Math Buzz on October 21, 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.*