AlienAlp vs BatLib
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AlienAlp
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The Invasive Alien Species threaten biodiversity, replacing native species, and degrade natural habitats and landscapes. Some of these plants are harmful to livestock and human health. With AlienAlp and a photo, you can contribute to the control of the most dangerous invasive alien species. Or you can identify the invasive exotic species closest to you !! This App operates in synergy with the Biodiversity Observatory of the Autonomous Region of Valle d'Aosta
BatLib
This app allows users to listen to and compare the ultrasonic calls of European bats, translated into audible frequencies. It aids in identifying bat species by comparing sounds to output from a BATSCANNER device and provides detailed information about each species.
- Play ultrasonic bat calls in audible range
- Compare sounds with BATSCANNER output
- Filter species by frequency
- Access detailed bat species information
- View photos and habitat details
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The BatLib app plays the different ultrasonic calls of most European bats, transformed into the audible range using the heterodyne mixer method. This is particularly useful for comparing directly with the output of the BATSCANNER device to help determine the species. 1. Enter the frequency that your BATSCANNER displays to filter the species 2. Listen to the typical bat call sequences 3. Compare the sound with what you hear from your BATSCANNER 4. Sounds similar? Read additional information about the bat species, such as acoustic characteristics, size, habitat, photos, etc. Further information about our bat products: www.batscanner.ch
Screenshots
Verdict
The clearest difference is iOS requirement: AlienAlp at 13.0 against BatLib's 15.0. On price, update cadence, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AlienAlp ships an update every 17 months, BatLib every 26 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | AlienAlp | BatLib |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 17 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 52 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | INSTITUT AGRICOLE REGIONAL | Elekon AG |
In-app purchases
AlienAlp
No in-app purchases
BatLib
No in-app purchases
