# Subby App vs Simple Invoicer

The clearest difference is update cadence: Subby App at every 2 months against Simple Invoicer's every 4 months. Subby App also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On price, 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.

Subby App ships an update every 2 months, Simple Invoicer every 4 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Subby App | Simple Invoicer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 47 MB | 3 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Road Tech Computer Systems Ltd.](https://appshunter.io/developer/740517139) | [ANDREW TIMNEY](https://appshunter.io/developer/1750246829) |

## What reviewers say

### Subby App

[App page](https://appshunter.io/ios/app/subby-app/id1671780514)

**In-app purchases:** none


### Simple Invoicer

[App page](https://appshunter.io/ios/app/simple-invoicer/id6746581966)

**In-app purchases:** none


## Frequently asked questions

### Is Subby App free?

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

### Is Simple Invoicer free?

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

### Do Subby App or Simple Invoicer have ads?

Neither Subby App nor Simple Invoicer shows ads.

### Which is updated more often, Subby App or Simple Invoicer?

Subby App ships an update every 2 months, and Simple Invoicer every 4 months. Most recently, Subby App was updated on October 30, 2026 and Simple Invoicer on October 30, 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.*