# CMSV9 vs GPS51

The clearest difference is review sentiment: CMSV9 at 100% against GPS51's 57%. CMSV9 also leads on rating (5.0 vs 3.7) and iOS requirement (10.0 vs 13.0). GPS51's advantage is update cadence (every 4 days vs every 2 months). On price, ratings volume, 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.

CMSV9 holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 100% of CMSV9's written reviews are positive against 57% of GPS51's.

CMSV9 ships an update every 2 months, GPS51 every 4 days. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | CMSV9 | GPS51 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cmsv9/id1450360250/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/gps51/id1503310033/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | **100.0% of reviews** | 56.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 118 MB | 121 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [永福 李](https://appshunter.io/developer/595580242) | [深圳安诺盛科技有限公司](https://appshunter.io/developer/1078143908) |

## What reviewers say

### CMSV9

[App page](https://appshunter.io/ios/app/cmsv9/id1450360250)

This platform enhances law enforcement operations with real-time GPS tracking, live video monitoring, and secure audio communication. It supports evidentiary preservation and data analysis, driving digitalization and intelligence in enforcement.

**Highlights:** Real-time GPS positioning, Live video preview, Real-time recording, Snapshot capture, Cluster intercom, Group broadcasting, Alarm push notifications

**In-app purchases:** none


### GPS51

[App page](https://appshunter.io/ios/app/gps51/id1503310033)

Monitor and manage the location, historical routes, and alerts for various trackers and IoT devices. View real-time fuel consumption, video feeds, and two-way audio. Supports multiple tracker protocols and IoT devices.

**Highlights:** Real-time location tracking, Historical route playback, Alerts and geofencing, Fuel consumption monitoring, Video and audio streaming, Support for various tracker protocols

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

**In-app purchases:** none


## Frequently asked questions

### Is CMSV9 free?

CMSV9 is free to download, with no in-app purchases.

### Is GPS51 free?

GPS51 is free to download, with no in-app purchases.

### Which has better reviews, CMSV9 or GPS51?

CMSV9 is rated higher. CMSV9 averages 5.0 out of 5 from 2 ratings, while GPS51 averages 3.7 from 3 ratings.

### Do CMSV9 or GPS51 have ads?

Neither CMSV9 nor GPS51 shows ads.

### Which is updated more often, CMSV9 or GPS51?

CMSV9 ships an update every 2 months, and GPS51 every 4 days. Most recently, CMSV9 was updated on June 1, 2026 and GPS51 on September 21, 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.*