# Keep Technologies vs Sound Meter Plus

The clearest difference is price: Keep Technologies at Free against Sound Meter Plus's $2.99. Keep Technologies also leads on update cadence (weekly vs every 39 months). Sound Meter Plus's advantage is in-app purchases (none vs 4) and iOS requirement (12.0 vs 15.0). On ads and device support there is nothing between them.

Keep Technologies is free to download; Sound Meter Plus costs $2.99 up front. Keep Technologies sells 4 in-app purchases, starting at $9.99 per month. Sound Meter Plus asks for nothing beyond the download.

Keep Technologies ships an update weekly, Sound Meter Plus every 39 months. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Keep Technologies | Sound Meter Plus |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.3 (32 ratings)](https://appshunter.io/ios/app/keep-technologies/id1591955434/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 39 months |
| Monetization | Free with in-app purchases | — |
| Size | 171 MB | 10 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Keep Technologies](https://appshunter.io/developer/1591955766) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### Keep Technologies

[App page](https://appshunter.io/ios/app/keep-technologies/id1591955434)

This system provides vehicle safety and security with an easy-to-install device. It automatically arms and disarms, sends instant notifications for events, and allows live video review. A monitoring service offers 24/7 peace of mind.

**Highlights:** Automatic arming/disarming, Instant event notifications, Live video review, 24/7 monitoring service, Easy installation

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cellular Connectivity Monthly | $9.99 | per month |
| Cellular Connectivity Monthly | $9.99 | per month |
| Cellular Connectivity Annual | $99.99 | per year |
| Cellular Connectivity Annual | $99.99 | per year |


### Sound Meter Plus

[App page](https://appshunter.io/ios/app/sound-meter-plus/id1612179628)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Keep Technologies free?

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

### Is Sound Meter Plus free?

Sound Meter Plus costs $2.99, with no in-app purchases.

### Do Keep Technologies or Sound Meter Plus have ads?

Neither Keep Technologies nor Sound Meter Plus shows ads.

### Which is updated more often, Keep Technologies or Sound Meter Plus?

Keep Technologies ships an update weekly, and Sound Meter Plus every 39 months. Most recently, Keep Technologies was updated on October 3, 2026 and Sound Meter Plus on October 11, 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.*