# Bills Simple vs Pro Flow Referrals

The clearest difference is in-app purchases: Pro Flow Referrals at none against Bills Simple's 4. Pro Flow Referrals also leads on update cadence (every 4 days vs every 3 weeks). Bills Simple's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Bills Simple sells 4 in-app purchases, starting at $9.99 per month. Pro Flow Referrals asks for nothing beyond the download.

Bills Simple ships an update every 3 weeks, Pro Flow Referrals every 4 days. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Bills Simple | Pro Flow Referrals |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 38 MB | 5 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Carlos Castillo](https://appshunter.io/developer/1860998092) | [Kauai Mold ERP](https://appshunter.io/developer/1824111679) |

## What reviewers say

### Bills Simple

[App page](https://appshunter.io/ios/app/bills-simple/id6756504452)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professionals | $9.99 | per month |
| Business | $44.99 | per month |
| Professionals Yearly | $85.00 | per year |
| Business Yearly | $299.99 | per year |


### Pro Flow Referrals

[App page](https://appshunter.io/ios/app/pro-flow-referrals/id6792775922)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bills Simple free?

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

### Is Pro Flow Referrals free?

Pro Flow Referrals is free to download, with no in-app purchases.

### Do Bills Simple or Pro Flow Referrals have ads?

Neither Bills Simple nor Pro Flow Referrals shows ads.

### Which is updated more often, Bills Simple or Pro Flow Referrals?

Bills Simple ships an update every 3 weeks, and Pro Flow Referrals every 4 days. Most recently, Bills Simple was updated on October 5, 2026 and Pro Flow Referrals on October 10, 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.*