# IngSoft InterWatt Mobile vs FED

The clearest difference is update cadence: IngSoft InterWatt Mobile at fortnightly against FED's every 4 months. 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.

IngSoft InterWatt Mobile ships an update fortnightly, FED every 4 months. The most recent releases landed on September 16, 2026 and July 31, 2026 respectively.

## The numbers

| Metric | IngSoft InterWatt Mobile | FED |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Size | 51 MB | 129 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IngSoft GmbH](https://appshunter.io/developer/945284664) | [Schweizerische Bundeskanzlei](https://appshunter.io/developer/1110875106) |

## What reviewers say

### IngSoft InterWatt Mobile

[App page](https://appshunter.io/ios/app/ingsoft-interwatt-mobile/id945284665)

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

**In-app purchases:** none


### FED

[App page](https://appshunter.io/ios/app/fed-login-access/id6467620427)

**In-app purchases:** none


## Frequently asked questions

### Is IngSoft InterWatt Mobile free?

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

### Is FED free?

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

### Do IngSoft InterWatt Mobile or FED have ads?

Neither IngSoft InterWatt Mobile nor FED shows ads.

### Which is updated more often, IngSoft InterWatt Mobile or FED?

IngSoft InterWatt Mobile ships an update fortnightly, and FED every 4 months. Most recently, IngSoft InterWatt Mobile was updated on September 16, 2026 and FED on July 31, 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.*