# Invoice Maker by RapidBooks vs Invoice Maker Flex

The clearest difference is update cadence: Invoice Maker Flex at every 5 days against Invoice Maker by RapidBooks's every 5 months. Invoice Maker Flex also leads on iOS requirement (13.0 vs 15.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Invoice Maker by RapidBooks sells 14 in-app purchases, starting at $3.99 per 7 days and Invoice Maker Flex sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Invoice Maker by RapidBooks against 4.8 for Invoice Maker Flex. Both are backed by a comparable volume of ratings — 20 and 49 respectively. Written reviews are what separate them: 100% of Invoice Maker by RapidBooks's written reviews are positive against 98% of Invoice Maker Flex's.

Invoice Maker by RapidBooks ships an update every 5 months, Invoice Maker Flex every 5 days. The most recent releases landed on September 7, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Invoice Maker by RapidBooks | Invoice Maker Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (20 ratings)](https://appshunter.io/ios/app/invoice-maker-by-rapidbooks/id1495012248/reviews) | [4.8 (49 ratings)](https://appshunter.io/ios/app/invoice-maker-flex/id1594306539/reviews) |
| Number of ratings | 20 | **49** |
| Positive reviews | **100.0% of reviews** | 97.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 70 MB | 98 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MicroSingle Technology Limited](https://appshunter.io/developer/1708558939) | [B TO J PTY LTD](https://appshunter.io/developer/569308231) |

## What reviewers say

### Invoice Maker by RapidBooks

[App page](https://appshunter.io/ios/app/invoice-maker-by-rapidbooks/id1495012248)

Create and send professional invoices and estimates on the go. This app helps small business owners, contractors, and freelancers get paid faster with features like online payment acceptance, reminders, and detailed reports. Stay organized and manage your business finances efficiently.

**Highlights:** Create professional invoices and estimates, Customize with business logo, Generate PDF invoices, Save frequently used items and clients, Accept online and offline payments, Send payment reminders, Track outstanding invoices with reports

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Monthly Subscription | $6.99 | per month |
| Monthly Sub 40 Off Discount | $7.99 | per month |
| Monthly Sub 40 Off Coupon | $7.99 | per month |
| Monthly Subscription | $11.99 | per month |
| Standard Monthly Subscription | $11.99 | per month |
| Monthly Subscription | $11.99 | per month |
| Annual Subscription | $49.99 | per year |
| Annual Subscription | $49.99 | per year |
| Annual Sub 40 Off Discount | $59.99 | per year |
| Annual Subscription | $59.99 | per year |
| Annual Subscription | $99.99 | per year |
| Standard Annual Subscription | $99.99 | per year |
| Annual Subscription | $99.99 | per year |


### Invoice Maker Flex

[App page](https://appshunter.io/ios/app/invoice-maker-flex/id1594306539)

Easily create, send, and track professional invoices and estimates for your business. Manage multiple users and devices, and get paid faster with integrated payment options. Perfect for freelancers and small business owners.

**Highlights:** Create professional invoices and estimates, Track paid and unpaid documents, Convert estimates to invoices, Export data as CSV, Add discounts and taxes, Support for multiple users and devices, Cloud sync and backup with subscription

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $5.99 | per month |
| 1 Year Subscription | $49.99 | per year |


## Frequently asked questions

### Is Invoice Maker by RapidBooks free?

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

### Is Invoice Maker Flex free?

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

### Which has better reviews, Invoice Maker by RapidBooks or Invoice Maker Flex?

Invoice Maker by RapidBooks and Invoice Maker Flex are both rated 4.8 out of 5 on the App Store, from 20 and 49 ratings respectively.

### Do Invoice Maker by RapidBooks or Invoice Maker Flex have ads?

Neither Invoice Maker by RapidBooks nor Invoice Maker Flex shows ads.

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

Invoice Maker by RapidBooks ships an update every 5 months, and Invoice Maker Flex every 5 days. Most recently, Invoice Maker by RapidBooks was updated on September 7, 2026 and Invoice Maker Flex on September 17, 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.*