# WhenDo vs Simple Mahjong Calculator

The clearest difference is iOS requirement: WhenDo at 9.0 against Simple Mahjong Calculator's 14.0. On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | WhenDo | Simple Mahjong Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simple-mahjong-calculator/id6743121161/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Monetization | Free | Free |
| Size | 50 MB | 16 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kent Humphries](https://appshunter.io/developer/980904115) | [Zhegang Xu](https://appshunter.io/developer/1710880748) |

## What reviewers say

### WhenDo

[App page](https://appshunter.io/ios/app/whendo/id1364482210)

Easily manage and visualize time differences with friends and loved ones. Share your availability visually using photos instead of clock icons, eliminating confusing time zone conversations. Works offline for convenient access anytime, anywhere.

**Highlights:** Visual time zone display, Photo-based friend representation, Simplified availability sharing, Offline functionality, Selfie integration for cities, Easy friend setup

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Mahjong Calculator

[App page](https://appshunter.io/ios/app/simple-mahjong-calculator/id6743121161)

Effortlessly track mahjong scores with this professional scoring tool. It automates calculations, validates scores, and saves game history, offering a clean interface and multi-language support for players worldwide.

**Highlights:** Automated score calculation, Real-time total display, Score validation, Automatic data saving, Multi-language support, Cross-platform compatibility

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WhenDo free?

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

### Is Simple Mahjong Calculator free?

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

### Do WhenDo or Simple Mahjong Calculator have ads?

Neither WhenDo nor Simple Mahjong Calculator shows ads.

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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.*