# ERMIS vs 4invoice

The clearest difference is in-app purchases: 4invoice at none against ERMIS's 2. 4invoice also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). ERMIS's advantage is update cadence (every 5 days vs every 3 months). On price and ads there is nothing between them.

Both are free to download. ERMIS sells 2 in-app purchases, starting at $19.99 per month. 4invoice asks for nothing beyond the download.

ERMIS ships an update every 5 days, 4invoice every 3 months. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ERMIS | 4invoice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/ermis-client-for-hermes/id6759341434/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 31 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ilya Vishneuski](https://appshunter.io/developer/1878175811) | [Cuspy Software LLC](https://appshunter.io/developer/1538914569) |

## What reviewers say

### ERMIS

[App page](https://appshunter.io/ios/app/ermis-client-for-hermes/id6759341434)

This app provides a mobile interface to control your self-hosted AI agent. Manage complex workflows, research topics, draft content, and solve coding problems remotely. Your data remains on your instance for enhanced privacy and control.

**Highlights:** Connect to your Hermes Agent instance, Research topics and summarize, Write, edit, and generate content, Assist with coding and debugging, Plan tasks and organize workflows, Remote agent management

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $19.99 | per month |
| Premium | $199.99 | per year |


### 4invoice

[App page](https://appshunter.io/ios/app/4invoice/id6759964957)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ERMIS free?

ERMIS is free to download, with in-app purchases available.

### Is 4invoice free?

4invoice is free to download, with no in-app purchases.

### Do ERMIS or 4invoice have ads?

Neither ERMIS nor 4invoice shows ads.

### Which is updated more often, ERMIS or 4invoice?

ERMIS ships an update every 5 days, and 4invoice every 3 months. Most recently, ERMIS was updated on October 20, 2026 and 4invoice on October 7, 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.*