# Salt mSign vs CalAmp K

The clearest difference is device support: CalAmp K at 3 against Salt mSign's 1. CalAmp K also leads on iOS requirement (12.0 vs 16.4). On price, update cadence, 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.

Salt mSign ships an update every 4 months, CalAmp K every 2 months. The most recent releases landed on October 10, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Salt mSign | CalAmp K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (590 ratings)](https://appshunter.io/ios/app/calamp-k-12/id1106947825/reviews)** |
| Number of ratings | — | **590** |
| Positive reviews | — | 84.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 53 MB | 28 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Salt Group](https://appshunter.io/developer/328013684) | [Synovia Solutions LLC](https://appshunter.io/developer/981902594) |

## What reviewers say

### Salt mSign

[App page](https://appshunter.io/ios/app/salt-msign/id436699557)

**Features:** Vision Pro support

**In-app purchases:** none


### CalAmp K

[App page](https://appshunter.io/ios/app/calamp-k-12/id1106947825)

This app helps manage public or private fleets to improve savings, safety, and customer service. Users can track vehicles, review historical routes, and manage vehicle details.

**Highlights:** Vehicle tracking, Historical route mapping, Vehicle property management, Fleet savings improvement, Enhanced safety features, Improved customer service

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent fleet tracking capabilities
- 👍 User-friendly and easy to use
- 📱 Convenient mobile access from field
- 🎯 Provides real-time vehicle location information
- ⚙️ Works well on Android devices

**What reviewers complain about**

- 🐛 Frequent app crashes and freezing
- ⚠️ Poor technical support responsiveness
- 📱 Significant iOS/iPhone compatibility issues
- 🔌 WiFi connectivity problems on iPhone
- ⏱️ Slow map navigation loading times

**Reported bugs**

- Cannot login on WiFi connection (iPhone)
- Map button takes ~1 minute to load
- Login credentials not persisted after inactivity
- App buffering excessively after updates
- GPS stop detection fails to indicate arrival

**Requested features**

- Live tracking prioritized over history view
- Turn-by-turn GPS navigation to tracked vehicles
- Improved documentation for app-specific features
- Better substitute driver management on map display
- Reduce or eliminate rating prompt frequency


## Frequently asked questions

### Is Salt mSign free?

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

### Is CalAmp K free?

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

### Do Salt mSign or CalAmp K have ads?

Neither Salt mSign nor CalAmp K shows ads.

### Which is updated more often, Salt mSign or CalAmp K?

Salt mSign ships an update every 4 months, and CalAmp K every 2 months. Most recently, Salt mSign was updated on October 10, 2026 and CalAmp K on October 23, 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.*