# AlienAlp vs BatLib

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.

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.

## The numbers

| Metric | AlienAlp | BatLib |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/batlib/id6469684050/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 17 months** | Every 26 months |
| Monetization | — | Free |
| Size | 52 MB | 38 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [INSTITUT AGRICOLE REGIONAL](https://appshunter.io/developer/1465241726) | [Elekon AG](https://appshunter.io/developer/1591447845) |

## What reviewers say

### AlienAlp

[App page](https://appshunter.io/ios/app/alienalp/id1465241727)

**Features:** macOS Compatibility

**In-app purchases:** none


### BatLib

[App page](https://appshunter.io/ios/app/batlib/id6469684050)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AlienAlp free?

AlienAlp is free to download, with no in-app purchases.

### Is BatLib free?

BatLib is free to download, with no in-app purchases.

### Do AlienAlp or BatLib have ads?

Neither AlienAlp nor BatLib shows ads.

### Which is updated more often, AlienAlp or BatLib?

AlienAlp ships an update every 17 months, and BatLib every 26 months. Most recently, AlienAlp was updated on November 6, 2026 and BatLib on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*