Shabbat Alarm Clock vs OpenSol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Shabbat Alarm Clock
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.
- 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)
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Wake up on time for minyan! The Shabbat Alarm Clock makes it easy to schedule alarms so you don't miss shul! Record your own ringtone or choose from a variety of sounds with varying lengths! Simply tap the Test Notification button to make sure your device is ready to go! No more guessing if it's set up correctly! Paid Features: -Repeat Alarms -Remove Ads Feedback is welcome! Let me know how to improve by sending an email to DanielGerberApps@Gmail.com
OpenSol
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.
- 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
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OpenSol is an independently developed Intel 8080 computer emulator inspired by the Processor Technology Sol-20 Terminal Computer. Explore a 64-by-16 character display, type directly into the original OpenSol firmware, and use the built-in Sol Command Monitor. Choose white, green, amber, or red phosphor; switch between a sharp flat display and period-inspired CRT effects; and use full-screen mode for an immersive terminal experience. OpenSol includes: • A complete independently written Intel 8080 interpreter • Original OpenSol firmware and Sol Command Monitor • iPhone, iPad, and Mac interfaces • Direct typing, touch input, external keyboards, and compatible game controllers • User-selected ENT and raw-binary file import • Private on-device Recent Programs and session restoration • Experimental virtual cassette and USB-audio cassette tools OpenSol includes no SOLOS ROM, vintage applications, download catalog, advertising, analytics, tracking, accounts, or network service. Users provide their own lawfully obtained compatible files. OpenSol is not affiliated with or endorsed by Processor Technology Corporation or any successor rights holder. Historical product names are used only to describe compatibility and historical context.
Screenshots
Verdict
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 4) and update cadence (every 4 days vs every 8 days). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 4, 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 8, 2026 respectively.
| Parameter | Shabbat Alarm Clock | OpenSol |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (468 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 90.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 468 — better | 4 |
| Update frequency | Every 4 days — better | Every 8 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 162 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Gerber | Jordan Ruderman |
Customer experience
Shabbat Alarm Clock
OpenSol
Bugs and requests
Shabbat Alarm Clock
Reported bugs
2 issues- Alarms ringing without any set
- App not working at all for some users
Requested features
4 requests- Recurring/weekly alarm scheduling
- Ability to bypass silent mode
- More alarm sound options
- Improved visual design
OpenSol
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Shabbat Alarm Clock
- Support the Developer$0.99
- Remove Ads$2.99
- Enable Repeating Alarms$2.99
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- Remove Ads + Repeating Alarms$4.99
OpenSol
No in-app purchases
Questions
Is Shabbat Alarm Clock free?
Is OpenSol free?
Which has better reviews, Shabbat Alarm Clock or OpenSol?
Do Shabbat Alarm Clock or OpenSol have ads?
Which is updated more often, Shabbat Alarm Clock or OpenSol?
Other comparisons
