# Trace Back vs FLOW

The clearest difference is in-app purchases: Trace Back at none against FLOW's 1. Trace Back also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. FLOW sells 1 one-off in-app purchase. Trace Back asks for nothing beyond the download.

## The numbers

| Metric | Trace Back | FLOW |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Fortnightly |
| Size | 33 MB | 82 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [洪升 曹](https://appshunter.io/developer/1846114663) | [Goncalo Simoes](https://appshunter.io/developer/642625981) |

## What reviewers say

### Trace Back

[App page](https://appshunter.io/ios/app/trace-back/id6760021737)

**In-app purchases:** none


### FLOW

[App page](https://appshunter.io/ios/app/flow-pipe-puzzle/id6820142051)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Trace Back free?

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

### Is FLOW free?

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

### Do Trace Back or FLOW have ads?

FLOW shows ads; Trace Back does not.

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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.*