OU Kosher vs Siddur
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OU Kosher
Easily search for OU Kosher certified products, including those for Passover. Get alerts on new certifications and access a hotline for kosher questions. This app provides direct access to Orthodox Union product information and resources.
- Product certification search
- Kosher for Passover products
- Product alerts
- Newly certified products
- Kosher question hotline
- Direct access to Orthodox Union information
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The OU Kosher product search is much more than a guide to products that are certified by the OU. OU Kosher includes, Kosher for Passover products, product alerts, newly certified products and the OU Kosher question and general information hotline. Just tap on the hotline button and ask your question. Enjoy easy and direct access on your iPhone, iPad and iPod touch to all of the Orthodox Union product’s information and other resources that will help you all year round.
Siddur
This smart prayer book offers the acclaimed Kehot Linear Siddur with easy navigation for all prayers and blessings. It includes a Zmanim calculator for accurate halachic times based on your location, a tefillin mirror, and a Mizrach compass.
- Smart prayers
- All prayers and blessings
- Halachic times calculator
- Hyperlinked table of contents
- Tefillin mirror
- Mizrach Compass
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A smart Siddur with halachic times Includes a tefillin mirror, compass, halachic times and more. Features the acclaimed Kehot Linear Siddur, now available wherever you are. Features: * Smart prayers * All the prayers and blessings with easy navigation * A "Zmanim" calculator that will give you the proper Halachic times for your location * Hyperlinked table of contents * Tefillin mirror * Mizrach Compass The Siddur that's always there for you. הסידור במהדורה לינארית – ניתן להשיג בכל מקום סידור תהילת ה' במהדורה לינארית באנגלית בצורת הדף של הסידור הנדפס כולל: • כל התפילות והברכות עם ניווט קל • חישוב אוטומטי של זמני ההלכה בכל מקום • מפתח התוכן עם קישור אוטומטי • ראי לתפילין • מצפן למצוא את ה"מזרח" הסידור שתמיד לצידך.
Screenshots
Verdict
The clearest difference is price: OU Kosher at Free against Siddur's $5.99. OU Kosher also leads on rating (4.1 vs 3.6) and review sentiment (68% vs 54%). Siddur's advantage is ads (none vs shown) and chart position (#166 vs unranked). On ratings volume, in-app purchases 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
OU Kosher is free to download; Siddur costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
OU Kosher holds the better App Store score, 4.1 against 3.6. Both are backed by a comparable volume of ratings — 15 and 36 respectively. Written reviews point the same way: 68% of OU Kosher's written reviews are positive against 54% of Siddur's.
OU Kosher ships an update every 5 weeks, Siddur every 3 months. The most recent releases landed on June 4, 2026 and September 22, 2026 respectively.
| Parameter | OU Kosher | Siddur |
|---|---|---|
| Price | Free — better | $5.99 |
| Rating | 4.1 (15 ratings) — better | 3.6 (36 ratings) |
| Positive reviews | 68.4% of reviews — better | 53.6% of reviews |
| Number of ratings | 15 | 36 — better |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Best chart rank | — | #166 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 32 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Orthodox Union | Chabad.org Jewish Apps |
Customer experience
OU Kosher
Siddur
In-app purchases
OU Kosher
No in-app purchases
Siddur
No in-app purchases
