Comparison

Roadkill | SPOTTERON vs Gestation Aging

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

Head to head
About

Roadkill | SPOTTERON

This citizen science app allows users to report roadkill sightings to a scientific database. Your contributions help researchers analyze data, identify hotspots, and develop solutions like wildlife crossings. It utilizes OpenStreetMap and is designed for modern smartphones.

Highlights
  • Report roadkill sightings
  • Contribute to scientific research
  • Identify wildlife hotspots
  • Utilizes OpenStreetMap
  • Create a SPOTTERON user account
Features
Read full description

The Citizen Science application "Roadkill" allows you to add roadkill sightings to the database of the Project by the University of natural resources and life sciences (BOKU) in Vienna, Austria. The Project Roadkill is powered by SPOTTERON, a system for citizen science applications on smartphones. By reporting roadkills you are helping by providing streamlined data for the scientific analysis of the current situation regarding the topic. With your entries, the science team then can identify hotspots at which roadkill occur regulary and adress those issues by e.g. building tunnels for migrating toads and frogs, or construct wildlife bridges over roads in cooperation with NGOs and local authorities. Roadkill | SPOTTERON utilizes OpenStreetMap and is designed for modern smartphones. You can register your own SPOTTERON User within the app and start adding spots to the database. More information about the austrian research project Roadkill is available in german at www.roadkill.at SUPPORT: You can find our support forum at: www.spotteron.com

About

Gestation Aging

Features
Read full description

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.

Screenshots

Roadkill | SPOTTERON4 screens

Verdict

The call

The clearest difference is price: Roadkill | SPOTTERON at Free against Gestation Aging's $0.99. Roadkill | SPOTTERON also leads on update cadence (every 3 months vs every 23 months) and device support (3 vs 1). Gestation Aging's advantage is iOS requirement (12.0 vs 14.0). 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

CostPrice · In-app purchases · Ads · Monetization

Roadkill | SPOTTERON 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

Roadkill | SPOTTERON ships an update every 3 months, Gestation Aging every 23 months. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Roadkill | SPOTTERON versus Gestation Aging: the parameters behind the verdict, then further details
ParameterRoadkill | SPOTTERONGestation Aging
PriceFree — better$0.99
Rating3.0 (4 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 months — betterEvery 23 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS14.012.0 — better
Further details — not scored
Size62 MB9 MB
Age rating12+4+
DeveloperSPOTTERON GmbhUniversity of Wisconsin - Madison School of Veterinary Medicine

In-app purchases

None

Roadkill | SPOTTERON

No in-app purchases

None

Gestation Aging

No in-app purchases

Questions

Is Roadkill | SPOTTERON free?
Roadkill | SPOTTERON is free to download, with no in-app purchases.
Is Gestation Aging free?
Gestation Aging costs $0.99, with no in-app purchases.
Do Roadkill | SPOTTERON or Gestation Aging have ads?
Neither Roadkill | SPOTTERON nor Gestation Aging shows ads.
Which is updated more often, Roadkill | SPOTTERON or Gestation Aging?
Roadkill | SPOTTERON ships an update every 3 months, and Gestation Aging every 23 months. Most recently, Roadkill | SPOTTERON was updated on October 11, 2026 and Gestation Aging on October 5, 2026.

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