# Postoboii Delivery vs Fast Simple Invoice Maker

The clearest difference is in-app purchases: Postoboii Delivery at none against Fast Simple Invoice Maker's 4. Postoboii Delivery also leads on update cadence (every 6 days vs fortnightly) and iOS requirement (13.0 vs 18.2). On price, ads and device support there is nothing between them.

Both are free to download. Fast Simple Invoice Maker sells 4 one-off in-app purchases. Postoboii Delivery asks for nothing beyond the download.

Postoboii Delivery ships an update every 6 days, Fast Simple Invoice Maker fortnightly. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Postoboii Delivery | Fast Simple Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Fortnightly |
| Size | 67 MB | 11 MB |
| Requires iOS | **13.0** | 18.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [REBUILDAPPS TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1668722853) | [Eric Savoie](https://appshunter.io/developer/1695096773) |

## What reviewers say

### Postoboii Delivery

[App page](https://appshunter.io/ios/app/postoboii-delivery/id6749766027)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Fast Simple Invoice Maker

[App page](https://appshunter.io/ios/app/fast-simple-invoice-maker/id6752559476)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Midnight Theme | $0.49 | one-time |
| Forest Theme | $0.49 | one-time |
| Warm Paper Theme | $0.49 | one-time |
| Theme - Ocean | $0.49 | one-time |


## Frequently asked questions

### Is Postoboii Delivery free?

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

### Is Fast Simple Invoice Maker free?

Fast Simple Invoice Maker is free to download, with in-app purchases available.

### Do Postoboii Delivery or Fast Simple Invoice Maker have ads?

Neither Postoboii Delivery nor Fast Simple Invoice Maker shows ads.

### Which is updated more often, Postoboii Delivery or Fast Simple Invoice Maker?

Postoboii Delivery ships an update every 6 days, and Fast Simple Invoice Maker fortnightly. Most recently, Postoboii Delivery was updated on October 19, 2026 and Fast Simple Invoice Maker on October 9, 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.*