# Ampère Mobile vs IMESS

The clearest difference is update cadence: IMESS at every 6 weeks against Ampère Mobile's every 11 months. IMESS also leads on iOS requirement (7.0 vs 11.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ampère Mobile ships an update every 11 months, IMESS every 6 weeks. The most recent releases landed on June 25, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Ampère Mobile | IMESS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ampere-mobile/id672293934/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 41 MB | 4 MB |
| Requires iOS | 11.0 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Electro Graphics Srl](https://appshunter.io/developer/542354467) | [My Appy](https://appshunter.io/developer/1018763271) |

## What reviewers say

### Ampère Mobile

[App page](https://appshunter.io/ios/app/ampere-mobile/id672293934)

This app provides essential tools for electricians and designers to calculate and verify electrical plant dimensions. It allows for immediate on-site evaluation and control of design data, including cable sizing, voltage drop, and temperature.

**Highlights:** Project calculation for current, cable sizing, voltage drop, and temperature, Support for low and medium voltage installations, Multiple international installation standards, Open, view, and edit electrical plant design files, On-site verification and photo storage, Real-time comment editing and sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### IMESS

[App page](https://appshunter.io/ios/app/imess/id889715583)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ampère Mobile free?

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

### Is IMESS free?

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

### Do Ampère Mobile or IMESS have ads?

Neither Ampère Mobile nor IMESS shows ads.

### Which is updated more often, Ampère Mobile or IMESS?

Ampère Mobile ships an update every 11 months, and IMESS every 6 weeks. Most recently, Ampère Mobile was updated on June 25, 2026 and IMESS on September 20, 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.*