# Shabbat Alarm Clock vs OpenSol

The clearest difference is in-app purchases: OpenSol at none against Shabbat Alarm Clock's 4. OpenSol also leads on ads (none vs shown) and rating (5.0 vs 4.8). Shabbat Alarm Clock's advantage is ratings volume (468 vs 5) and update cadence (every 4 days vs every 8 days). On price and device support there is nothing between them.

Both are free to download. Shabbat Alarm Clock sells 4 one-off in-app purchases. OpenSol asks for nothing beyond the download.

OpenSol holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Shabbat Alarm Clock has 468 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 90% of Shabbat Alarm Clock's written reviews are positive against 100% of OpenSol's.

Shabbat Alarm Clock ships an update every 4 days, OpenSol every 8 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Shabbat Alarm Clock | OpenSol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (468 ratings)](https://appshunter.io/ios/app/shabbat-alarm-clock/id1485334479/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/opensol/id6802088485/reviews)** |
| Number of ratings | **468** | 5 |
| Positive reviews | 90.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 8 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 162 MB | 11 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Gerber](https://appshunter.io/developer/1485334478) | [Jordan Ruderman](https://appshunter.io/developer/6802088577) |

## What reviewers say

### Shabbat Alarm Clock

[App page](https://appshunter.io/ios/app/shabbat-alarm-clock/id1485334479)

Schedule alarms to wake up for services and avoid missing shul. Customize ringtones with your own recordings or select from various sounds. Test notifications to ensure proper setup.

**Highlights:** Schedule alarms for Shabbat and Yom Tov, Record custom ringtones, Choose from various sound options, Test notification functionality, Repeat alarms (paid feature), Ad removal (paid feature)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support the Developer | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Enable Repeating Alarms | $2.99 | one-time |
| Remove Ads + Repeating Alarms | $4.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 👍 Reliable and dependable
- 🕰️ Helpful for Shabbat/holiday observance
- 💡 Unique features like record-your-own alarm
- 🕰️ Automatically turns off alarm after set time

**What reviewers complain about**

- 🐛 New update has poor interface and usability
- 🤖 Ads and in-app purchases
- 🔇 Alarms can be too quiet for some users

**Reported bugs**

- Alarms ringing without any set
- App not working at all for some users

**Requested features**

- Recurring/weekly alarm scheduling
- Ability to bypass silent mode
- More alarm sound options
- Improved visual design


### OpenSol

[App page](https://appshunter.io/ios/app/opensol/id6802088485)

Experience a classic 8080 computer emulator inspired by the Sol-20 Terminal Computer. Interact with original firmware, customize display effects, and enjoy an immersive terminal experience. This independently developed app offers a unique retro computing simulation.

**Highlights:** Intel 8080 interpreter, Original OpenSol firmware, Sol Command Monitor, Customizable display effects (CRT, phosphor), Full-screen immersive mode, External keyboard and controller support, Virtual cassette tools

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Shabbat Alarm Clock free?

Shabbat Alarm Clock is free to download, with in-app purchases available.

### Is OpenSol free?

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

### Which has better reviews, Shabbat Alarm Clock or OpenSol?

OpenSol is rated higher. Shabbat Alarm Clock averages 4.8 out of 5 from 468 ratings, while OpenSol averages 5.0 from 5 ratings.

### Do Shabbat Alarm Clock or OpenSol have ads?

Shabbat Alarm Clock shows ads; OpenSol does not.

### Which is updated more often, Shabbat Alarm Clock or OpenSol?

Shabbat Alarm Clock ships an update every 4 days, and OpenSol every 8 days. Most recently, Shabbat Alarm Clock was updated on October 23, 2026 and OpenSol on October 24, 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.*