# imp™ vs Sound Shield WATCH

The clearest difference is review sentiment: imp™ at 100% against Sound Shield WATCH's 50%. imp™ also leads on price (Free vs $4.99) and rating (5.0 vs 4.5). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

imp™ is free to download; Sound Shield WATCH costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

imp™ holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: imp™ has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of imp™'s written reviews are positive against 50% of Sound Shield WATCH's.

imp™ ships an update every 2 months, Sound Shield WATCH every 30 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | imp™ | Sound Shield WATCH |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (12 ratings)](https://appshunter.io/ios/app/imp-imp-box-controller/id1509443801/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/sound-shield-watch/id1574826870/reviews) |
| Number of ratings | **12** | 2 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 30 months |
| Monetization | **Free** | Paid |
| Size | 36 MB | 12 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Its My Phone, Inc](https://appshunter.io/developer/1509443800) | [HOBEEC](https://appshunter.io/developer/465035845) |

## 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


### Sound Shield WATCH

[App page](https://appshunter.io/ios/app/sound-shield-watch/id1574826870)

This app emits high-frequency sounds to deter mosquitoes. It's designed to be a convenient insect repellent, though some younger users may be able to hear the frequencies.

**Highlights:** High-frequency sound generation, Mosquito deterrence, Convenient insect repellent, Works on watch and iPhone

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is imp™ free?

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

### Is Sound Shield WATCH free?

Sound Shield WATCH costs $4.99, with no in-app purchases.

### Which has better reviews, imp™ or Sound Shield WATCH?

imp™ is rated higher. imp™ averages 5.0 out of 5 from 12 ratings, while Sound Shield WATCH averages 4.5 from 2 ratings.

### Do imp™ or Sound Shield WATCH have ads?

Neither imp™ nor Sound Shield WATCH shows ads.

### Which is updated more often, imp™ or Sound Shield WATCH?

imp™ ships an update every 2 months, and Sound Shield WATCH every 30 months. Most recently, imp™ was updated on October 24, 2026 and Sound Shield WATCH on October 16, 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.*