# happ vs Simplimmat

The clearest difference is review sentiment: Simplimmat at 96% against happ's 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.

happ ships an update every 4 months, Simplimmat every 3 months. The most recent releases landed on September 19, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | happ | Simplimmat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (16 ratings)](https://appshunter.io/ios/app/simplimmat/id1547799669/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | 3.7% of reviews | **96.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 64 MB | 139 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ENGIE](https://appshunter.io/developer/435501932) | [Agence nationale des titres securises](https://appshunter.io/developer/1547799671) |

## What reviewers say

### happ

[App page](https://appshunter.io/ios/app/happ-e-by-engie/id1545612133)

Track your electricity and natural gas consumption, view bills, make payments, and manage your energy contract. This app provides essential information for monitoring your energy usage.

**Highlights:** Track electricity and gas consumption, View bills, Make payments, Manage contract, Monitor energy usage

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

**In-app purchases:** none


### Simplimmat

[App page](https://appshunter.io/ios/app/simplimmat/id1547799669)

This official government app streamlines the process of buying and selling used vehicles. It allows both parties to securely complete the vehicle transfer declaration digitally, eliminating the need for paper forms. Buyers can also immediately order a new registration certificate.

**Highlights:** Digital vehicle transfer declaration, Secure and dematerialized process, Immediate provisional registration certificate, View and download vehicle documents, Supports specific vehicle types (VP, TM, QM, etc.), Add co-owners to vehicle file

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is happ free?

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

### Is Simplimmat free?

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

### Do happ or Simplimmat have ads?

Neither happ nor Simplimmat shows ads.

### Which is updated more often, happ or Simplimmat?

happ ships an update every 4 months, and Simplimmat every 3 months. Most recently, happ was updated on September 19, 2026 and Simplimmat on September 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.*