# Bat Detector vs Detector.

The clearest difference is review sentiment: Bat Detector at 40% against Detector.'s 0%. Bat Detector also leads on in-app purchases (none vs 2) and ads (none vs shown). Detector.'s advantage is update cadence (weekly vs monthly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Detector. sells 2 in-app purchases, starting at $1.99 per month. Bat Detector asks for nothing beyond the download.

Bat Detector ships an update monthly, Detector. weekly. Both last shipped on September 2, 2026.

## The numbers

| Metric | Bat Detector | Detector. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/bat-detector/id6504186190/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 136 MB | 176 MB |
| Requires iOS | 15 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Phil Atkin](https://appshunter.io/developer/1751268739) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### Bat Detector

[App page](https://appshunter.io/ios/app/bat-detector/id6504186190)

Listen to and record the ultrasonic sounds of bats using your iPhone or iPad. This app reveals bat acoustics through heterodyne detection and 16x time expansion, making their calls audible and musical. It also offers full-spectrum recordings triggered by bat sounds.

**Highlights:** Heterodyne bat detection without manual tuning, 16x time expansion for audible bat sounds, Full-spectrum recordings triggered by bat sounds, Real-time sound demodulation, Preserves harmonic relationships in bat calls, Supports European and global microbats

**In-app purchases:** none


### Detector.

[App page](https://appshunter.io/ios/app/detector/id6758643348)

This app uses your phone's sensors to scan for hidden signals, wireless activity, and environmental anomalies. It helps inspect spaces for suspicious devices and provides detailed reports for privacy and security analysis. Features include room mapping, risk assessment, and device diagnostics.

**Highlights:** Hidden signal scanning, Device analysis, Room mapping, Risk assessment, Detailed reporting, Environmental anomaly detection, Offline mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| detector_by_oliva_subscription | $1.99 | per month |
| detector_by_oliva_donation | $1.99 | one-time |


## Frequently asked questions

### Is Bat Detector free?

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

### Is Detector. free?

Detector. is free to download, with in-app purchases available.

### Do Bat Detector or Detector. have ads?

Detector. shows ads; Bat Detector does not.

### Which is updated more often, Bat Detector or Detector.?

Bat Detector ships an update monthly, and Detector. weekly. Most recently, Bat Detector was updated on September 2, 2026 and Detector. on September 2, 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.*