# imp™ vs Sonar

The clearest difference is in-app purchases: imp™ at none against Sonar's 3. imp™ also leads on device support (3 vs 1) and iOS requirement (12.1 vs 16.4). Sonar's advantage is update cadence (every 3 weeks vs every 2 months). On price and ads there is nothing between them.

Both are free to download. Sonar sells 3 in-app purchases, starting at $4.99 per 7 days. imp™ asks for nothing beyond the download.

imp™ ships an update every 2 months, Sonar every 3 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | imp™ | Sonar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (12 ratings)](https://appshunter.io/ios/app/imp-imp-box-controller/id1509443801/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 36 MB | 55 MB |
| Requires iOS | **12.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Its My Phone, Inc](https://appshunter.io/developer/1509443800) | [Caue Mattos Silvestre](https://appshunter.io/developer/6780304569) |

## What reviewers say

### imp™

[App page](https://appshunter.io/ios/app/imp-imp-box-controller/id1509443801)

This app works with a smart home device to filter unwanted landline calls, allowing only desired contacts to reach you. It also functions as a remote answering machine for your landline, letting you manage voicemails from anywhere.

**Highlights:** Real-time call filtering, Greenlist Technology™, Syncs iPhone contacts, Remote voicemail access, Do Not Disturb mode, Invite others to landline

**In-app purchases:** none


### Sonar

[App page](https://appshunter.io/ios/app/sonar-hidden-camera-detector/id6788882245)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly Subscription | $8.99 | per month |
| Annual Subscription | $29.99 | per year |


## Frequently asked questions

### Is imp™ free?

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

### Is Sonar free?

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

### Do imp™ or Sonar have ads?

Neither imp™ nor Sonar shows ads.

### Which is updated more often, imp™ or Sonar?

imp™ ships an update every 2 months, and Sonar every 3 weeks. Most recently, imp™ was updated on October 24, 2026 and Sonar on October 31, 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.*