Ultimate Zmanim vs SiddurApp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ultimate Zmanim
This app provides accurate Jewish calendar times, including Shabbat candle lighting, holidays, and daily prayer times, with customizable reminders and offline functionality. It offers a user-friendly interface with timeline navigation and Apple Watch integration for convenient access to important halachic times.
- GPS-based zmanim calculations
- Shabbat candle lighting times
- Holiday and weekly parashah information
- Daf Yomi tracking
- Customizable daily reminders
- Apple Watch companion app
- Offline functionality
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Ultimate Zmanim is the premiere zmanim app for iOS, now with even more features. iOS Features: - GPS-based calculations - Calendrical information, including Shabbat candle lighting times, weekly parashah, chagim, and daf yomi - Daily reminders, scheduled based on zmanim - Beautiful printouts for your shul's bimah or your fridge - Over 100 calculations to customize according to - Companion watch app featuring complications - Today widget in Notification Center - Intuitive timeline navigation - Force touch shortcuts to quickly access alarms, location settings, and more - Split-screen multitasking support on iPad watchOS Features: - Native to watchOS, so it's faster than ever - Expanded complications - Tap a zman for a detailed explanation of the calculation - Force touch menu options, including one to reload your location --- Description: Ultimate Zmanim calculates times using your GPS for maximum accuracy. There's also a rich location picker, so you don't have to be online to set it up. Ultimate Zmanim always works, even when there's no internet. Ultimate Zmanim doesn't stop with the daily zmanim - it also lists chagim, the weekly parashah for both in Israel and out, candle lighting times, and daf yomi. Today's zmanim fade out as they pass, so you can tell what's next at a glance. Ultimate Zmanim also runs on Apple Watch, so you can get notifications, and information about the next upcoming zman right on your watch. With Zmanim Alarms, Ultimate Zmanim can remind you of important zmanim throughout the day. Shema, t'fila, and weekly candle lighting are all covered. Ultimate Zmanim supports printing of the daily Zmanim via AirPrint. You can use this to hang them up in public places, such as your shul, school, or mikveh. You can look up zmanim for any day by tapping on the timeline or the Hebrew date to show a date picker. Tap again to hide it. You can also drag in either direction for convenient access to the previous or the next day. The timeline also supports both the Hebrew and Gregorian calendars. Open the date picker to switch between them. Ultimate Zmanim will remember your selection across app launches. Ultimate Zmanim has been a long time in the making, and I hope you enjoy using it as much as I enjoyed building it! --- What users from the United States, Canada and the United Kingdom are saying: "Best zmanim app out there, gorgeous and intuitive, thanks!!" - tzviki123 "This is my favorite Zmanim app. It's got a beautiful design and the widget is also super helpful. Keep up the great work!" - Bmw1821 "This app nails the difficult challenge of making spiritual software. I love going through my day knowing that my phone will alert me to all the ritually important times." - portal keeper "Great presentation of halachic zmanim with really nice apple watch interface" - Paul Claman "I live in England and I carry it around with me where ever I go. It's got all the info you need including what day of daf hayomi it is.... 5*****" - Rubi roxx ---
SiddurApp
This app provides a digital Jewish prayer book for iOS devices, featuring a "Smart" panel that displays relevant prayers based on the time of day and location. It also offers a prayer direction compass and customizable prayer time displays.
- Smart prayer selection by time of day
- Location-based prayer times
- Prayer direction compass (Qibla)
- Customizable prayer displays
- Access to specific prayers like Birkat Ha'mazon
- Adjustable interface language (Hebrew)
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SiddurApp is a siddur application, in which users can view the Jewish prayer book on their iOS device in smart ways, using technology to allow for easier davening. It currently contains the Sephard version ("nusach"), as well as a beta version of "Edot Ha'mizrach". On activation, the "Smart" option shows the relevant prayer for that time of day: If you have allowed the app to be know your location, it will use it to determine local prayer times (it may take a few seconds for it to locate your current location).. The "Smart" view includes: • showing only parts of prayer relevant for that specific day (e.g., no Chanuka prayers in Nissan). • Short timed additions to prayer ("Aseret ye'mey tshuva", "Rosh chodesh") have partial bold appearance (i.e., some of the new text is bold). 30 days after rain/no-rain change, the changed text appears in bold. If you want to reassure yourself you said them, you can tap the text and the bold becomes highlighted, so you can scroll back later, to verify you said it (it isn't remembered in history, just as long as you're davening that particular prayer) • Uses GPS to determine if in Jerusalem for Purim, to show relevant prayer. • Using settings, you can choose to add diaspora-only sections (in Arvit) and prayers for drought. Upon activating the app, the upper corner shows a small arrow, pointing at the direction of prayer ("beit hamikdash") for several seconds (which you can set in the Settings panel). To see the direction again, you can see a compass in the Jerusalem panel. Note that this works only if the user allowed the app to know your location, and if the app has been able to focus on a location and a direction within 10 seconds of activating the app. To access any random prayer you want, the app's main menu allows to see a full prayer list, and one and select your option from the list. You can use choose to see the full version (when relevant), so instead of seeing the "Smart" version, e.g., today's Shacharit, one can see the "Full" version, with all the options available for that prayer. The tab bar (by default, including Birkat Ha'mazon and Tfilat Ha'derech) can be changed to include any prayers one wants (up to 4), using the Settings panel. The app allow for set alarms for shabat -- they are one time and brief, and thus do not need to be turned of manually. They work using iOS' notifications, thus requiring the device's sound to be turned on in order to work. To replace snooze setting, a long press on the save the alarm button, one can save multiple alarms around that time: at the time itself, and then 3, 5, 7, 10, 13 and 15 minutes following it. The app's main menu allows to see all the Jewish times of day, including netz, sunset, etc. Settings allow changing the app's interface to Hebrew, as well as setting whether certain parts of the prayers (e.g., Kadish) should be collapsed or expanded by default. Collapsed parts will show as button that needs to be clicked, and relevant prayer expands inline (this is also the case with chazarat ha'shats parts). WARNING AND DISCLAIMER: This app is offered "as is", and IT DOES NOT MAKE ANY GUARANTEES ON ANY ISSUE. This includes, but not limited to, not making any halchaic or textual exactness claims. DO NOT USE IT TO DETERMINE HALCHAIC QUESTIONS! Due to compass and GPS imprecision (as well as algorithmic limitations), it may show an inexact direction of prayer, as well as deviations in the times of the days. THIS APPLICATION MAKES NO GUARANTEE REGARDING EXACTNESS OF DIRECTION, TIME, OR PRAYER TEXT. As I do not wish users to err, I reiterate - THIS APP MAKES NO GUARANTEES ON THE INFORMATION IT PRESENTS, AND IF YOU CHOOSE TO USE IT, IT IS NOT LIABLE FOR ANY ERRORS IN PRAYER TEXT, TIMES OF DAY, DIRECTION OF PRAYER, AND ANY OTHER INFORMATION IT PRESENTS.
Screenshots
Verdict
The clearest difference is in-app purchases: SiddurApp at none against Ultimate Zmanim's 1. SiddurApp also leads on review sentiment (87% vs 78%). Ultimate Zmanim's advantage is ratings volume (131 vs 29) and device support (5 vs 1). On price, rating, update cadence and ads 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. Ultimate Zmanim sells 1 one-off in-app purchase. SiddurApp asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.3 for Ultimate Zmanim against 4.2 for SiddurApp. Both are backed by a comparable volume of ratings — 131 and 29 respectively. Written reviews are what separate them: 78% of Ultimate Zmanim's written reviews are positive against 87% of SiddurApp's.
Ultimate Zmanim ships an update every 2 weeks, SiddurApp every 3 weeks. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.
| Parameter | Ultimate Zmanim | SiddurApp |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (131 ratings) — better | 4.2 (29 ratings) |
| Positive reviews | 77.9% of reviews | 87.1% of reviews — better |
| Number of ratings | 131 — better | 29 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Mac, Apple Watch — better | iPhone |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 7 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Moshe Berman | Omer Lev |
Customer experience
Ultimate Zmanim
SiddurApp
Bugs and requests
Ultimate Zmanim
Reported bugs
28 issues- App keeps alerting with LA time instead of current location
- White screen when opening app on iPad
- App will no longer open on iPad
- Update broke the app
- Winter time displayed after upgrade
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- Error in the app
- First update messed up Zmanim, widget info incorrect, Zmanim same for Jerusalem and Brooklyn
- App shuts right off after new update
- App doesn't open since the update
- App does not open since the last update
- Version 11.7.1 did not completely address the issue with iOS16 update, gets 'stuck'
- 'Reset To Today' function does not bring back to the current date
- One day discrepancy in Zmanim including calendar calculations since iOS16 update
- Omer counting is wrong on some days
- Zmanim alerts giving alerts for a location five hours ahead
- Hebrew titles in the widget not working
- Bug in Chanukah: started a day early, repeated Light 1, repeated Light 3, others a day late, ended a day late
- Watch complication not available for most watch faces
- iOS 14 widgets not found for Infograph and Infograph modular watch faces
- Zmanim are all off on Apple Watch 5, no complications
- Watch os versions keeps on uninstalling itself
- Cannot do anything like print
- Ad's background music
- Location resets to current waypoint when trying to check other cities
- If location services are off, Zmanim are not shown
- Latest version contains a mistake: changing location does not hold, reverts to current location
- Crashes on iPhone 5c with iOS10.3, blank screen
- Cannot check Zmanim for anywhere else, switches back to current location
Requested features
15 requests- Mizrach compass
- Apple Watch face complication to display custom Zmanim
- Customization to carry over to watch app
- Daf Yomi (Yerushalmi) option
- Hebrew date in the widget
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- Alert/alarm for Sunset (Shkiah)
- Pull to refresh option
- Add Jewish holidays
- Dark mode support
- iOS 14 widgets
- Jewish calendar for holidays
- Ability to add and title Jewish dates (birthdays, yahrtzeits)
- Option to choose what to show on iWatch complication
- Support for Infograph watch faces
- Reminders for Maariv/Tzeit Hakochavim
SiddurApp
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Ultimate Zmanim
- Premium Pack$2.99
SiddurApp
No in-app purchases







