Todo Math vs Synthesis24
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Todo Math
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.
- 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
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The #1 math app for early learners — from counting to multiplication. ■ #1 in the App Store in 20+ countries and created by an award-winning team. More than 10 million parents and 5,000 teachers have made Todo Math their go-to app for young learners › COMPREHENSIVE: 2,000+ interactive math activities for Pre-K through 2nd grade. › LOVED BY KIDS: math practice kids ask to play. Engaging gameplay, beautiful graphics, and adorable collectibles. › EDUCATIONAL: Common Core State Standards-aligned curriculum. 5,000+ elementary classrooms have used Todo Math. › INCLUSIVE & ACCESSIBLE: playable in 8 languages, left-handed mode, help button, dyslexic font and other accessibility features empower ALL children to learn independently. Try Todo Math for free today! › Easy email signup. › No commitment, no credit card information collected. ■ Todo Math covers all the fundamentals of early math education › Counting and Number Concepts - learn to write and count numbers. › Calculation - practice addition, subtraction, multiplication, and word problems. › Mathematical Logic - number-based memory games and pictographs. › Geometry - Learn basic geometry, such as drawing and learning shapes. › Clocks & Calendars – learn days of the week, months of the year, and how to tell time. ■ Todo Math lets you select the right challenge level for your child › Level A (Preschool) – Count to 10 and identify the names of shapes. › Level B (Kindergarten Basics) – Count to 20, and add and subtract within 5. › Level C (Kindergarten Mastery) – Count to 100, add and subtract within 10, tell time to the hour. › Level D (1st Grade Basics) – Place value and simple geometry. › Level E (1st Grade Mastery) – Carry-over addition, subtraction with borrowing, and dividing a plane figure equally. › Level F (2nd Grade Basics) – Three-digit addition and subtraction, measurements with ruler, and graph data. › Level G (2nd Grade Mastery) – Comparing three-digit numbers, addition and subtraction of two-digit numbers, foundation of multiplication. › Level H (3rd Grade Basics) – Learn to do basic division. Understand the concept of fractions and know how many faces, edges, vertices each 3D shape contains. › Not sure of which level is right for your child? No problem! Use the in-app placement test. ■ Parents Page › Easily change your child’s level, edit their learning profile, and review their learning progress. › Sync profiles across multiple devices, including cross-platform. ■ Built by Experts › Leading education experts from Harvard, Stanford, UC Berkeley, and Seoul National University. › Award-winning children mobile app designers. › Team was named co-winner of the Global Learning XPRIZE competition, a worldwide competition to have children teach themselves math and literacy skills. ■ Awards & Recognitions › #1 in the App Store (education category) in 20+ countries, including USA, China, the United Kingdom, Korea and Japan. › SIIA CODiE award finalist (2016). › Winner of the Parents’ Choice Award — Mobile App category (2015, 2018). › Awarded Best Design at the LAUNCH Education & Kids Conference (2013). › 5 out of 5 star rating from Common Sense Media. ■ Safety and Privacy › Todo Math complies with the US Children's Online Privacy Policy, does not contain any third party advertising, and can be played without an internet connection. ■ The Todo Math app that was serviced separately in the the Australian App Store has been unified with the global version. Please search for Todo Math in the App Store and install again. Log in with an existing account to continue where you left off. ■ Have questions? › Please check the FAQ on our website's help section (http://todomath.com/help). › You can get the fastest response by going to the website > Help > Contact Us or the in the Todo Math app > Parents Page > Help. ∙ ∙ ∙ We empower ALL children to learn independently.
Synthesis24
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"Synthesis 24" is a puzzle game based on mathematical logic. The specified numbers and operation symbols are formed into 3 formulas, so that the final answer is 24. There are hundreds of cleverly designed level modes and an endless mode with countless levels, waiting for you to challenge! Come and exercise your mathematical thinking Game Features: 1. Through the use of numbers and symbols, make the specified number calculate 24, exercise brain thinking. 2. Make the game more interesting by dragging. 3. Hundreds of cleverly designed levels that are extremely challenging. 4. Endless mode with countless levels to meet your needs to pass the time and exercise mathematical thinking. 5. Free forever. 6. Continue to update more levels and gameplay. Our games can exercise people's mathematical thinking ability, including oral and mental arithmetic, can develop intelligence, improve independent thinking ability and logical thinking. Simple numbers, including endless thinking and careful logic, and the fun of solving problems can all be reflected in our game. Come and try and experience the charm of numbers!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Todo Math | Synthesis24 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.1K ratings) — better | — |
| Positive reviews | 73.9% of reviews | — |
| Number of ratings | 1.1K — better | — |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 588 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Enuma, Inc. | 杰超 杨 |
Bugs and requests
Todo Math
Reported bugs
3 issues- Sound not working on some devices
- Handwriting recognition issues
- Progress reset after app updates
Requested features
5 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Todo Math
- One Year Subscription$49.99
- One Year Subscription2 variants$69.99
- One Year Subscription2 variants$79.99
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- Two Years Subscription$89.99
- One Year Subscription2 variants$99.99
- Two Years Subscription2 variants$119.99
Synthesis24
No in-app purchases
Questions
Is Todo Math free?
Is Synthesis24 free?
Do Todo Math or Synthesis24 have ads?
Which is updated more often, Todo Math or Synthesis24?
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