# Flex vs Invoice Maker

The clearest difference is in-app purchases: Flex at none against Invoice Maker's 3. Invoice Maker's advantage is iOS requirement (16.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Invoice Maker sells 3 in-app purchases, starting at $6.99 per 7 days. Flex asks for nothing beyond the download.

Flex ships an update weekly, Invoice Maker every 9 days. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Flex | Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/invoice-maker-receipt-maker/id6754967739/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 75 MB | 91 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [FlexSante](https://appshunter.io/developer/1798915339) | [Invoice Maker™](https://appshunter.io/developer/1851170747) |

## What reviewers say

### Flex

[App page](https://appshunter.io/ios/app/flex-facility/id6742541333)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-receipt-maker/id6754967739)

Easily create professional invoices, send estimates, and track payments and expenses. This tool helps businesses get paid faster, manage cash flow, and maintain a professional client image. It automates tasks like recurring invoices and reminders, offering financial insights through reports.

**Highlights:** Generate professional invoices, Send estimates and proposals, Track payments and expenses, Automatic tax calculations, Recurring invoices and reminders, Financial reports and insights

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Monthly | $24.99 | per month |
| Yearly | $149.99 | per year |


## Frequently asked questions

### Is Flex free?

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

### Is Invoice Maker free?

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

### Do Flex or Invoice Maker have ads?

Neither Flex nor Invoice Maker shows ads.

### Which is updated more often, Flex or Invoice Maker?

Flex ships an update weekly, and Invoice Maker every 9 days. Most recently, Flex was updated on September 23, 2026 and Invoice Maker on September 20, 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.*