# Cashflow Engineers vs 567Sing

The clearest difference is in-app purchases: Cashflow Engineers at none against 567Sing's 18. Cashflow Engineers also leads on iOS requirement (15.1 vs 26.0). 567Sing's advantage is update cadence (every 6 weeks vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. 567Sing sells 18 in-app purchases, starting at $4.99 per month. Cashflow Engineers asks for nothing beyond the download.

Cashflow Engineers ships an update every 5 months, 567Sing every 6 weeks. The most recent releases landed on September 8, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Cashflow Engineers | 567Sing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (14 ratings)](https://appshunter.io/ios/app/567sing/id6473779491/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 88 MB | 91 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Maestro Marketing LLC](https://appshunter.io/developer/1683483509) | [Curt Hansen](https://appshunter.io/developer/1719775253) |

## What reviewers say

### Cashflow Engineers

[App page](https://appshunter.io/ios/app/cashflow-engineers/id6448095223)

**Features:** macOS Compatibility

**In-app purchases:** none


### 567Sing

[App page](https://appshunter.io/ios/app/567sing/id6473779491)

Develop your vocal abilities and stage presence with a method designed for dancers. Learn techniques, set goals, and receive expert guidance to confidently perform. Stand out in competitive dance and auditions.

**Highlights:** Dance Voice Method by Broadway Star, Vocal technique development, Goal setting and progress tracking, Individual coaching and guidance, Community of competitive dancers, Access to expert vocal support

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

**In-app purchases (18)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Exercise Challenge | $4.99 | per month |
| 567Sing Studio Monthly | $9.99 | per month |
| Daily Vocal Workouts | $14.99 | per month |
| Step Up & Sing - Monthly | $34.99 | per month |
| 567Sing Studio Yearly | $79.99 | per year |
| 567Sing Yearly Member | $349.99 | per year |
| 567Sing Studio | $779.99 | per year |
| Step Up & Sing - Yearly | $999.99 | per year |
| Step Up & Sing Course | $27.00 | one-time |
| 567Sing Membership | $34.99 | one-time |
| Dance Voice Quick Start | $37.00 | one-time |
| Step Up & Sing | $37.00 | one-time |
| Daily Vocal Workout | $99.99 | one-time |
| 567Sing Teen Collective | $269.99 | one-time |
| Audition Accelerator | $299.00 | one-time |
| Dance With Your Voice | $999.00 | one-time |
| 567Sing Mentorship | $1000.00 | one-time |
| ChoreoVox Studio | $1000.00 | one-time |


## Frequently asked questions

### Is Cashflow Engineers free?

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

### Is 567Sing free?

567Sing is free to download, with in-app purchases available.

### Do Cashflow Engineers or 567Sing have ads?

Both Cashflow Engineers and 567Sing show ads.

### Which is updated more often, Cashflow Engineers or 567Sing?

Cashflow Engineers ships an update every 5 months, and 567Sing every 6 weeks. Most recently, Cashflow Engineers was updated on September 8, 2026 and 567Sing on September 13, 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.*