Gestation Aging vs USDA PPRL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gestation Aging
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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.
USDA PPRL
This app helps livestock owners identify poisonous plants to prevent animal loss. It provides a searchable database of toxic flora and allows users to report livestock poisonings to the research lab.
- Identify poisonous plants
- Searchable plant database
- Prevent livestock loss
- Report livestock poisonings
- Awareness of toxic flora
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The Poisonous Plant Research Lab App by USDA is aimed to help livestock owners (Ranchers) in preventing/minimizing the loss of their livestock by giving them awareness about poisonous plant. The app will allow a rancher to search for poisonous plants using the information provided in the Application via bulletin 415. Users will be able to contact PPRL to report their livestock poisoning.
Screenshots
Verdict
The clearest difference is price: USDA PPRL at Free against Gestation Aging's $0.99. USDA PPRL 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 15.0). On ads and in-app purchases 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
USDA PPRL is free to download; Gestation Aging costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Gestation Aging ships an update every 23 months, USDA PPRL every 2 months. The most recent releases landed on May 17, 2026 and September 14, 2026 respectively.
| Parameter | Gestation Aging | USDA PPRL |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 4.8 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 23 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 9 MB | 42 MB |
| Age rating | 4+ | 17+ |
| Developer | University of Wisconsin - Madison School of Veterinary Medicine | Utah State University |
In-app purchases
Gestation Aging
No in-app purchases
USDA PPRL
No in-app purchases
Questions
Is Gestation Aging free?
Is USDA PPRL free?
Do Gestation Aging or USDA PPRL have ads?
Which is updated more often, Gestation Aging or USDA PPRL?
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