# Trach vs Abacus Simulator

The clearest difference is monetization model: Trach at free against Abacus Simulator's free with in-app purchases. Trach also leads on review sentiment (93% vs 72%). Abacus Simulator's advantage is ratings volume (41 vs 13) and iOS requirement (13.0 vs 16.0). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Trach sells 1 one-off in-app purchase and Abacus Simulator sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Trach against 4.7 for Abacus Simulator. Both are backed by a comparable volume of ratings — 13 and 41 respectively. Written reviews are what separate them: 93% of Trach's written reviews are positive against 72% of Abacus Simulator's.

Trach ships an update every 2 weeks, Abacus Simulator every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Trach | Abacus Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13 ratings)](https://appshunter.io/ios/app/trach-trachtenberg/id1502611431/reviews)** | [4.7 (41 ratings)](https://appshunter.io/ios/app/abacus-simulator/id1558355099/reviews) |
| Number of ratings | 13 | **41** |
| Positive reviews | **93.3% of reviews** | 72.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 41 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Giorgio Network, LLC](https://appshunter.io/developer/1502611430) | [Nicholas Ang](https://appshunter.io/developer/1558355101) |

## What reviewers say

### Trach

[App page](https://appshunter.io/ios/app/trach-trachtenberg/id1502611431)

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.

**Highlights:** Trachtenberg method tutorials, Practice exercises, Progress tracking, Mental math techniques, Rapid multiplication, Number sense development

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Multiply Tutorials | $4.99 | one-time |


### Abacus Simulator

[App page](https://appshunter.io/ios/app/abacus-simulator/id1558355099)

Enhance your mental math abilities with interactive abacus exercises. This app offers guided lessons and daily drills to improve calculation speed, focus, and accuracy. Customize your abacus for a fun and engaging learning experience.

**Highlights:** Interactive abacus exercises, Guided step-by-step lessons, Daily skill-sharpening exercises, Focus, speed, and accuracy improvement, Customizable abacus

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud Beads | $1.99 | one-time |
| Coconut Beads | $1.99 | one-time |
| Lemon Beads | $1.99 | one-time |
| Mushroom Beads | $1.99 | one-time |
| Penguin Beads | $1.99 | one-time |
| Flower Beads | $1.99 | one-time |
| Orange Beads | $1.99 | one-time |
| Snail Beads | $1.99 | one-time |
| Snowman Beads | $1.99 | one-time |
| Watermelon Beads | $1.99 | one-time |


## Frequently asked questions

### Is Trach free?

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

### Is Abacus Simulator free?

Abacus Simulator is free to download, with in-app purchases available.

### Which has better reviews, Trach or Abacus Simulator?

Trach is rated higher. Trach averages 4.7 out of 5 from 13 ratings, while Abacus Simulator averages 4.7 from 41 ratings.

### Do Trach or Abacus Simulator have ads?

Neither Trach nor Abacus Simulator shows ads.

### Which is updated more often, Trach or Abacus Simulator?

Trach ships an update every 2 weeks, and Abacus Simulator every 3 weeks. Most recently, Trach was updated on October 23, 2026 and Abacus Simulator on October 24, 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.*