# Stackd vs 勉強カレンダー、簡単登録！進捗が分かる、やる気継続

The clearest difference is in-app purchases: 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 at none against Stackd's 1. 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18). On price, update cadence and ads there is nothing between them.

Both are free to download. Stackd sells 1 one-off in-app purchase. 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 asks for nothing beyond the download.

Stackd ships an update fortnightly, 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 weekly. The most recent releases landed on September 14, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Stackd | 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 3 MB | 78 MB |
| Requires iOS | 18 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nene Nakagawa](https://appshunter.io/developer/1821103094) | [Kazuaki Takahashi](https://appshunter.io/developer/1691521543) |

## 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 |


### 勉強カレンダー、簡単登録！進捗が分かる、やる気継続

[App page](https://appshunter.io/ios/app/id6785962096)

**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 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 free?

勉強カレンダー、簡単登録！進捗が分かる、やる気継続 is free to download, with no in-app purchases.

### Do Stackd or 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 have ads?

Neither Stackd nor 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 shows ads.

### Which is updated more often, Stackd or 勉強カレンダー、簡単登録！進捗が分かる、やる気継続?

Stackd ships an update fortnightly, and 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 weekly. Most recently, Stackd was updated on September 14, 2026 and 勉強カレンダー、簡単登録！進捗が分かる、やる気継続 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.*