# Flip Clock vs AppStack

The clearest difference is in-app purchases: Flip Clock at none against AppStack's 1. Flip Clock also leads on iOS requirement (15.5 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. AppStack sells 1 one-off in-app purchase. Flip Clock asks for nothing beyond the download.

## The numbers

| Metric | Flip Clock | AppStack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Size | 2 MB | 14 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SeungHyun Hong](https://appshunter.io/developer/1633579150) | [Jean-Marc Lai](https://appshunter.io/developer/1896575110) |

## What reviewers say

### Flip Clock

[App page](https://appshunter.io/ios/app/flip-clock/id1633579148)

**In-app purchases:** none


### AppStack

[App page](https://appshunter.io/ios/app/appstack-pics-and-apps/id6768460171)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App Stack Pro | $2.99 | one-time |


## Frequently asked questions

### Is Flip Clock free?

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

### Is AppStack free?

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

### Do Flip Clock or AppStack have ads?

Neither Flip Clock nor AppStack shows ads.

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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.*