# Shift & Stack vs Ref!Ref!Ref!

The clearest difference is in-app purchases: Shift & Stack at none against Ref!Ref!Ref!'s 2. Shift & Stack also leads on ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Ref!Ref!Ref! sells 1 one-off in-app purchase. Shift & Stack asks for nothing beyond the download.

## The numbers

| Metric | Shift & Stack | Ref!Ref!Ref! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 5 days |
| Size | 54 MB | 147 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [eitezaz ahmad](https://appshunter.io/developer/1027303006) | [Aziz Ahmet Saybir](https://appshunter.io/developer/6788466053) |

## What reviewers say

### Shift & Stack

[App page](https://appshunter.io/ios/app/shift-and-stack/id6757802613)

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

**In-app purchases:** none


### Ref!Ref!Ref!

[App page](https://appshunter.io/ios/app/refrefref/id6788466051)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Shift & Stack free?

Shift & Stack is free to download, with no in-app purchases.

### Is Ref!Ref!Ref! free?

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

### Do Shift & Stack or Ref!Ref!Ref! have ads?

Ref!Ref!Ref! shows ads; Shift & Stack 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.*