Trach vs Abacus Exercise
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trach
Master rapid mental math with this app, offering step-by-step tutorials and practice exercises for complex calculations. Learn and practice the Trachtenberg method to sharpen your number sense and multiply faster.
- Trachtenberg method tutorials
- Practice exercises
- Progress tracking
- Mental math techniques
- Rapid multiplication
- Number sense development
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Trach is the ultimate app for learning and practicing the Trachtenberg method—a system of mental math techniques that make complex calculations quick and intuitive. With step-by-step tutorials and practice exercises, you’ll develop a deep understanding of rapid multiplication, all while sharpening your number sense. Why Trach? - Learn the Trachtenberg method at your own pace - Practice with problems of varying difficulty - Track your progress and improve over time - No ads, no distractions—just pure learning Master calculations like 172413 × 11 in seconds. Whether you're a student, a math enthusiast, or just curious about mental math tricks, Trach makes learning effortless. Download Trach today and start multiplying faster than ever.
Abacus Exercise
Practice abacus calculations with a customizable digital tool. Adjust bead colors, sounds, and layout for a personalized learning experience. Challenge yourself with addition, subtraction, multiplication, and division exercises.
- Customizable abacus layout
- Adjustable bead size and position
- Up to 15-digit support
- Customizable bead colors and sounds
- Addition, subtraction, multiplication, division practice
- Level-based challenges
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This app focuses on the ease of use of the abacus on the app, and aims to realize smooth and comfortable operability. In addition to being able to use the abacus widely on the horizontal screen, the size and position can be freely customized according to the device. The number of digits can be used up to 15 digits, and the color and sound of the beads can also be set. You can challenge the addition and subtraction, multiplication, division questions according to your level.
Screenshots
Verdict
The clearest difference is review sentiment: Trach at 93% against Abacus Exercise's 46%. Trach also leads on ads (none vs shown) and rating (4.7 vs 4.4). Abacus Exercise's advantage is in-app purchases (none vs 1) and ratings volume (62 vs 13). On price, update cadence 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. Trach sells 1 one-off in-app purchase. Abacus Exercise asks for nothing beyond the download.
Trach holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 13 and 62 respectively. Written reviews point the same way: 93% of Trach's written reviews are positive against 46% of Abacus Exercise's.
Trach ships an update every 2 weeks, Abacus Exercise every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Trach | Abacus Exercise |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (13 ratings) — better | 4.4 (62 ratings) |
| Positive reviews | 93.3% of reviews — better | 46.2% of reviews |
| Number of ratings | 13 | 62 — better |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | Giorgio Network, LLC | Hirokazu Komatsu |
Customer experience
Trach
Abacus Exercise
In-app purchases
Trach
- Unlock All Multiply Tutorials$4.99
Abacus Exercise
No in-app purchases
