# Ultimate Zmanim vs Siddur AI

The clearest difference is rating: Siddur AI at 5.0 against Ultimate Zmanim's 4.3. Siddur AI also leads on in-app purchases (none vs 1) and update cadence (every 3 days vs every 2 weeks). Ultimate Zmanim's advantage is ratings volume (131 vs 2) and device support (5 vs 2). On price, ads and monetization model there is nothing between them.

Both are free to download. Ultimate Zmanim sells 1 one-off in-app purchase. Siddur AI asks for nothing beyond the download.

Siddur AI holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Ultimate Zmanim has 131 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 78% of Ultimate Zmanim's written reviews are positive against 100% of Siddur AI's.

Ultimate Zmanim ships an update every 2 weeks, Siddur AI every 3 days. The most recent releases landed on October 21, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Ultimate Zmanim | Siddur AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (131 ratings)](https://appshunter.io/ios/app/ultimate-zmanim/id452921604/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/siddur-ai/id6761738180/reviews)** |
| Number of ratings | **131** | 2 |
| Positive reviews | 77.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 7 MB | 30 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Moshe Berman](https://appshunter.io/developer/362306433) | [David Miller](https://appshunter.io/developer/1814676762) |

## What reviewers say

### Ultimate Zmanim

[App page](https://appshunter.io/ios/app/ultimate-zmanim/id452921604)

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.

**Highlights:** 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

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pack | $2.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🌟 Accurate Zmanim calculations
- 🌍 Global Zmanim data
- ✨ Clean and intuitive interface
- 🎨 Customizable options

**What reviewers complain about**

- 🐛 App crashes/doesn't open
- 🐛 Location issues
- 🐛 Watch app/complications not working
- 🐛 Incorrect Zmanim times
- 🐛 Updates breaking the app

**Reported bugs**

- 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

**Requested features**

- 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


### Siddur AI

[App page](https://appshunter.io/ios/app/siddur-ai/id6761738180)

This app serves as a daily prayer companion for Jewish individuals. It provides an easy-to-use siddur to follow daily services. Optional premium features offer AI chat guidance and prayer explanations.

**Highlights:** Daily prayer services, Easy-to-use siddur, AI chat guidance, Prayer explanations, Narration features

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

**In-app purchases:** none


## Frequently asked questions

### Is Ultimate Zmanim free?

Ultimate Zmanim is free to download, with in-app purchases available.

### Is Siddur AI free?

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

### Which has better reviews, Ultimate Zmanim or Siddur AI?

Siddur AI is rated higher. Ultimate Zmanim averages 4.3 out of 5 from 131 ratings, while Siddur AI averages 5.0 from 2 ratings.

### Do Ultimate Zmanim or Siddur AI have ads?

Neither Ultimate Zmanim nor Siddur AI shows ads.

### Which is updated more often, Ultimate Zmanim or Siddur AI?

Ultimate Zmanim ships an update every 2 weeks, and Siddur AI every 3 days. Most recently, Ultimate Zmanim was updated on October 21, 2026 and Siddur AI on October 17, 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.*