# Stackd vs Study Clock Timer

The clearest difference is update cadence: Study Clock Timer at every 3 days against Stackd's fortnightly. 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 Study Clock Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Stackd ships an update fortnightly, Study Clock Timer every 3 days. The most recent releases landed on September 14, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Stackd | Study Clock Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Size | 3 MB | 5 MB |
| Requires iOS | 18 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Nene Nakagawa](https://appshunter.io/developer/1821103094) | [Tatsuya Kawasaki](https://appshunter.io/developer/562479077) |

## 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 |


### Study Clock Timer

[App page](https://appshunter.io/ios/app/study-clock-timer/id6780480380)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a drink | $2.99 | one-time |


## Frequently asked questions

### Is Stackd free?

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

### Is Study Clock Timer free?

Study Clock Timer is free to download, with in-app purchases available.

### Do Stackd or Study Clock Timer have ads?

Neither Stackd nor Study Clock Timer shows ads.

### Which is updated more often, Stackd or Study Clock Timer?

Stackd ships an update fortnightly, and Study Clock Timer every 3 days. Most recently, Stackd was updated on September 14, 2026 and Study Clock Timer on September 18, 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.*