# Atom Calculator vs Mahjong Camera

The clearest difference is price: Mahjong Camera at Free against Atom Calculator's $2.99. Mahjong Camera also leads on update cadence (every 6 weeks vs every 35 months). Atom Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Mahjong Camera is free to download; Atom Calculator costs $2.99 up front. Mahjong Camera sells 1 one-off in-app purchase. Atom Calculator asks for nothing beyond the download.

Atom Calculator ships an update every 35 months, Mahjong Camera every 6 weeks. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Atom Calculator | Mahjong Camera |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.6 (10 ratings)](https://appshunter.io/ios/app/mahjong-camera/id6475007399/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 35 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 13 MB | 220 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gorasiya Vishal Nanjibhai](https://appshunter.io/developer/1287086933) | [Wing Hin Liu](https://appshunter.io/developer/1723040905) |

## What reviewers say

### Atom Calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Mahjong Camera

[App page](https://appshunter.io/ios/app/mahjong-camera/id6475007399)

Effortlessly calculate Mahjong scores by scanning your winning hand. Supports multiple game variations and provides a waits calculator to identify all possible winning patterns. Save and share score tables easily.

**Highlights:** Scan winning hands for instant scoring, Supports Riichi, Hong Kong, Taiwanese Mahjong, Mahjong waits calculator, Save and share score tables, Record game scores

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Lifetime Subscription | $7.99 | one-time |


## Frequently asked questions

### Is Atom Calculator free?

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

### Is Mahjong Camera free?

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

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

Mahjong Camera shows ads; Atom Calculator does not.

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

Atom Calculator ships an update every 35 months, and Mahjong Camera every 6 weeks. Most recently, Atom Calculator was updated on September 30, 2026 and Mahjong Camera on September 29, 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.*