# Todo Math vs Synthesis24

The clearest difference is in-app purchases: Synthesis24 at none against Todo Math's 10. Todo Math's advantage is update cadence (every 3 weeks vs every 3 months) and iOS requirement (11.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Todo Math sells 6 one-off in-app purchases. Synthesis24 asks for nothing beyond the download.

Todo Math ships an update every 3 weeks, Synthesis24 every 3 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Todo Math | Synthesis24 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/todo-math/id666465255/reviews)** | — |
| Number of ratings | **1.1K** | — |
| Positive reviews | 73.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 588 MB | 49 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Enuma, Inc.](https://appshunter.io/developer/577646433) | [杰超 杨](https://appshunter.io/developer/1364053114) |

## What reviewers say

### Todo Math

[App page](https://appshunter.io/ios/app/todo-math/id666465255)

This app offers over 2,000 interactive math activities for children from preschool to 2nd grade. It covers counting, calculation, logic, geometry, and time-telling, with adjustable challenge levels and accessibility features for all learners.

**Highlights:** 2,000+ interactive math activities, Covers counting, calculation, logic, geometry, time, Adjustable challenge levels (Pre-K to 2nd grade), Accessibility features (8 languages, dyslexic font), Parent dashboard for progress tracking, Placement test for accurate level selection

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Year Subscription | $49.99 | one-time |
| One Year Subscription | $69.99 | one-time |
| One Year Subscription | $79.99 | one-time |
| Two Years Subscription | $89.99 | one-time |
| One Year Subscription | $99.99 | one-time |
| Two Years Subscription | $119.99 | one-time |

**What reviewers like**

- 👍 Engaging and educational math games
- 🚀 Effective for learning math concepts
- 💡 Customizable settings for different learning styles
- 👍 Visually appealing and non-distracting graphics
- 👍 Helpful for students with special needs

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 💰 Expensive subscription model
- 🔒 Lack of transparency around subscription details
- 🚫 Removal of free features in later versions

**Reported bugs**

- Sound not working on some devices
- Handwriting recognition issues
- Progress reset after app updates

**Requested features**

- Expand content to higher grade levels
- Add more languages and currency options
- Improve progress tracking and reporting for parents
- Introduce more personalization options
- Provide offline access to content


### Synthesis24

[App page](https://appshunter.io/ios/app/synthesis24/id1606353407)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Todo Math free?

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

### Is Synthesis24 free?

Synthesis24 is free to download, with no in-app purchases.

### Do Todo Math or Synthesis24 have ads?

Neither Todo Math nor Synthesis24 shows ads.

### Which is updated more often, Todo Math or Synthesis24?

Todo Math ships an update every 3 weeks, and Synthesis24 every 3 months. Most recently, Todo Math was updated on September 24, 2026 and Synthesis24 on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*