# Shabbos Clock vs Kumu.

The clearest difference is update cadence: Kumu. at weekly against Shabbos Clock's every 4 months. Shabbos Clock's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Shabbos Clock costs $0.99 and Kumu. $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Shabbos Clock ships an update every 4 months, Kumu. weekly. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Shabbos Clock | Kumu. |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[2.4 (21 ratings)](https://appshunter.io/ios/app/shabbos-clock/id302172998/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 30.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free | — |
| Size | 89 MB | 40 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RustyBrick, Inc.](https://appshunter.io/developer/286478370) | [Alon Malev](https://appshunter.io/developer/6812031769) |

## What reviewers say

### Shabbos Clock

[App page](https://appshunter.io/ios/app/shabbos-clock/id302172998)

This app provides a solution for observant Jews who wish to use their smartphone during Shabbat. It offers customizable alarms that adhere to religious guidelines, including automatic shut-off and no snooze function. The app also allows alarms to be set based on local sunrise and sunset times.

**Highlights:** Unlimited alarm options, Automatic alarm shut-off, No snooze button, Repeatable weekly alarms, Alarms based on sunrise/sunset offsets, Full iOS11 and iPhone X support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Kumu.

[App page](https://appshunter.io/ios/app/kumu/id6812031767)

**In-app purchases:** none


## Frequently asked questions

### Is Shabbos Clock free?

Shabbos Clock costs $0.99, with no in-app purchases.

### Is Kumu. free?

Kumu. costs $0.99, with no in-app purchases.

### Do Shabbos Clock or Kumu. have ads?

Neither Shabbos Clock nor Kumu. shows ads.

### Which is updated more often, Shabbos Clock or Kumu.?

Shabbos Clock ships an update every 4 months, and Kumu. weekly. Most recently, Shabbos Clock was updated on October 21, 2026 and Kumu. on October 13, 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.*