# Atom Calculator vs Mahjong Scorer

The clearest difference is price: Mahjong Scorer at Free against Atom Calculator's $2.99. Mahjong Scorer also leads on update cadence (every 8 days vs every 35 months). Atom Calculator's advantage is ads (none vs shown) and device support (3 vs 1). On in-app purchases there is nothing between them.

Mahjong Scorer is free to download; Atom Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Atom Calculator ships an update every 35 months, Mahjong Scorer every 8 days. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Atom Calculator | Mahjong Scorer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mahjong-scorer/id6736632044/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 35 months | **Every 8 days** |
| Monetization | — | Ad-supported |
| Size | 13 MB | 117 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gorasiya Vishal Nanjibhai](https://appshunter.io/developer/1287086933) | [Mikael de Verdier](https://appshunter.io/developer/1772765275) |

## What reviewers say

### Atom Calculator

[App page](https://appshunter.io/ios/app/atom-calculator/id1457529377)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mahjong Scorer

[App page](https://appshunter.io/ios/app/mahjong-scorer/id6736632044)

This app uses AI to automatically score Mahjong hands from a photo. It allows players to track scores across multiple rounds and customize scoring rules. Designed for both casual players and enthusiasts, it removes the complexity of manual scoring.

**Highlights:** AI-powered photo scoring, Automatic hand scoring, Multi-round score tracking, Customizable scoring rules, Player score management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Atom Calculator free?

Atom Calculator costs $2.99, with no in-app purchases.

### Is Mahjong Scorer free?

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

### Do Atom Calculator or Mahjong Scorer have ads?

Mahjong Scorer shows ads; Atom Calculator does not.

### Which is updated more often, Atom Calculator or Mahjong Scorer?

Atom Calculator ships an update every 35 months, and Mahjong Scorer every 8 days. Most recently, Atom Calculator was updated on October 26, 2026 and Mahjong Scorer on October 27, 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.*