# Stackd vs Proof Workshop

The clearest difference is iOS requirement: Proof Workshop at 15.0 against Stackd's 18. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stackd sells 1 one-off in-app purchase and Proof Workshop sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Stackd | Proof Workshop |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 3 MB | 20 MB |
| Requires iOS | 18 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nene Nakagawa](https://appshunter.io/developer/1821103094) | [INPHIL CHOI](https://appshunter.io/developer/6785766361) |

## What reviewers say

### Stackd

[App page](https://appshunter.io/ios/app/stackd-study-timer-and-tracker/id6761293821)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stackd Pro | $1.99 | one-time |


### Proof Workshop

[App page](https://appshunter.io/ios/app/proof-workshop-math-major/id6816328454)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $4.99 | one-time |


## Frequently asked questions

### Is Stackd free?

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

### Is Proof Workshop free?

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

### Do Stackd or Proof Workshop have ads?

Neither Stackd nor Proof Workshop 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.*