# SignalClock Lite vs Mental arithmetic quiz

The clearest difference is update cadence: Mental arithmetic quiz at every 8 days against SignalClock Lite's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

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

SignalClock Lite ships an update every 7 months, Mental arithmetic quiz every 8 days. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | SignalClock Lite | Mental arithmetic quiz |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 8 days** |
| Monetization | Free | — |
| Size | 28 MB | 38 MB |
| Requires iOS | **12.0** | 12.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masafumi Endoh](https://appshunter.io/developer/757354996) | [LiRen Sun](https://appshunter.io/developer/1649265349) |

## What reviewers say

### SignalClock Lite

[App page](https://appshunter.io/ios/app/signalclock-lite/id908918011)

This utility app displays a digital clock with a time signal function using local notifications. It offers multiple sound sets and font options. The free version has limitations on scheduling time signals to half-hour intervals.

**Highlights:** Local notification time signals, Multiple sound sets, iOS 10 font support, Half-hour signal scheduling (free edition), Digital clock display

**Features:** macOS Compatibility

**In-app purchases:** none


### Mental arithmetic quiz

[App page](https://appshunter.io/ios/app/mental-arithmetic-quiz/id6443785734)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SignalClock Lite free?

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

### Is Mental arithmetic quiz free?

Mental arithmetic quiz is free to download, with no in-app purchases.

### Do SignalClock Lite or Mental arithmetic quiz have ads?

Neither SignalClock Lite nor Mental arithmetic quiz shows ads.

### Which is updated more often, SignalClock Lite or Mental arithmetic quiz?

SignalClock Lite ships an update every 7 months, and Mental arithmetic quiz every 8 days. Most recently, SignalClock Lite was updated on November 1, 2026 and Mental arithmetic quiz 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.*