# Stackd vs ひとつずつ。

The clearest difference is in-app purchases: ひとつずつ。 at none against Stackd's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stackd sells 1 one-off in-app purchase. ひとつずつ。 asks for nothing beyond the download.

## The numbers

| Metric | Stackd | ひとつずつ。 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 3 MB | 1 MB |
| Requires iOS | 18 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nene Nakagawa](https://appshunter.io/developer/1821103094) | [fukuoka yuichi](https://appshunter.io/developer/1895712946) |

## 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 |


### ひとつずつ。

[App page](https://appshunter.io/ios/app/id6764275913)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stackd free?

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

### Is ひとつずつ。 free?

ひとつずつ。 is free to download, with no in-app purchases.

### Do Stackd or ひとつずつ。 have ads?

Neither Stackd nor ひとつずつ。 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.*