Comparison

Gestation Aging vs Open Bible Stories

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Gestation Aging

Features
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The Gestation Aging app helps the user estimate the age of gestation in the the species of animal chosen. The user picks the ultrasound measurement from the pick list and the app returns the gestation age. The species represented in this app include Bovine (Cow), Ovine (Sheep), Caprine (Goat), Camelid (Alpaca, Llama, Camel), Equine (Horse), Cervine (Deer), Bubaline (Buffalo), Canine (Dog), Feline (Cat) and Porcine (Swine). Within some species (Caprine, Camelid, Cervine and Canine), a list of animal types is offered. Each species has its own set of measured items used to assess the age of the fetus. Gestation age in days is either calculated based on formulas or derived from look up tables. The days to parturition is calculated using the average accepted gestation length and subtracting the gestation age. Also included is a +/- value to illustrate the normal range of gestation length.

About

Open Bible Stories

Features
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The Open Bible Stories app is a powerful, free resource for anyone who wants to learn and share the foundational stories of the Bible. Developed by unfoldingWord, this app contains 50 carefully-selected stories, tracing the redemptive narrative from Creation to the return of Jesus. Whether you are a parent, a teacher, a missionary, or simply someone who wants to understand the Bible better, this app is a great tool for personal growth and for sharing the Gospel with others. The stories are presented in a simple, easy-to-understand format, making them accessible to a global audience, including those who are new to the Christian faith or do not have a full Bible in their own language. Key Features: - 50 Core Stories: Covers the most important stories of the Old and New Testaments. - Multi-Media Format: Engage with the stories through text and audio. - Evangelism and Discipleship Tool: Designed to help you share the good news and build a deeper understanding of the Bible's narrative. - Open and Free: All content is under an open license, giving you the freedom to use, copy, and translate the stories without restriction. - Offline Access: No internet connection is required to access the stories once downloaded. Download the Open Bible Stories app today and start exploring God's Word in a new way! https://github.com/unfoldingWord/obs-app

Screenshots

Open Bible Stories4 screens

Verdict

The call

The clearest difference is price: Open Bible Stories at Free against Gestation Aging's $0.99. Open Bible Stories also leads on update cadence (every 2 months vs every 23 months) and device support (3 vs 1). Gestation Aging's advantage is iOS requirement (12.0 vs 15.1). On ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Open Bible Stories is free to download; Gestation Aging costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Gestation Aging ships an update every 23 months, Open Bible Stories every 2 months. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

Scorecard4 real differences ยท 2 level
Gestation Aging versus Open Bible Stories: the parameters behind the verdict, then further details
ParameterGestation AgingOpen Bible Stories
Price$0.99Free โ€” better
Update frequencyEvery 23 monthsEvery 2 months โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPadiPhone, iPad, iPod โ€” better
Requires iOS12.0 โ€” better15.1
Further details โ€” not scored
Size9 MB55 MB
Age rating4+4+
DeveloperUniversity of Wisconsin - Madison School of Veterinary MedicineunfoldingWord

In-app purchases

None

Gestation Aging

No in-app purchases

None

Open Bible Stories

No in-app purchases

Questions

Is Gestation Aging free?
Gestation Aging costs $0.99, with no in-app purchases.
Is Open Bible Stories free?
Open Bible Stories is free to download, with no in-app purchases.
Do Gestation Aging or Open Bible Stories have ads?
Neither Gestation Aging nor Open Bible Stories shows ads.
Which is updated more often, Gestation Aging or Open Bible Stories?
Gestation Aging ships an update every 23 months, and Open Bible Stories every 2 months. Most recently, Gestation Aging was updated on October 26, 2026 and Open Bible Stories on October 28, 2026.

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