# Stack｜自己投資アプリ vs KPass(ケーパス)

The clearest difference is in-app purchases: Stack｜自己投資アプリ at none against KPass(ケーパス)'s 10. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. KPass(ケーパス) sells 10 in-app purchases, starting at $0.99 per month. Stack｜自己投資アプリ asks for nothing beyond the download.

Stack｜自己投資アプリ ships an update every 10 days, KPass(ケーパス) weekly. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Stack｜自己投資アプリ | KPass(ケーパス) |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 65.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | — | Free |
| Size | 41 MB | 137 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Nagato Kadoya](https://appshunter.io/developer/1575311338) | [YUYA ITONAGA](https://appshunter.io/developer/1823050360) |

## What reviewers say

### Stack｜自己投資アプリ

[App page](https://appshunter.io/ios/app/stack/id6745755185)

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

**In-app purchases:** none


### KPass(ケーパス)

[App page](https://appshunter.io/ios/app/kpass/id6754703817)

This app streamlines university life by integrating class schedules, assignments, and communication into one platform. It offers features like automatic schedule generation, deadline reminders, and attendance tracking to support busy students.

**Highlights:** Integrated class schedule with direct access to course pages, Unified assignment list with deadline grouping and reminders, Attendance tracking and management, Calendar and personal schedule integration, In-app communication and grade management, Social features for student interaction, Convenience tools like room finder and bus schedules

**Features:** macOS Compatibility, Safari Extension

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KPass Plus (月額) | $0.99 | per month |
| KPass AI 使い放題 | $1.99 | per month |
| KPass Pro (月額) | $2.99 | per month |
| KPass AI 10パック | $0.49 | one-time |
| 開発者にお菓子をあげる | $0.49 | one-time |
| KPass AI 30パック | $1.99 | one-time |
| 開発者にコーヒーをあげる | $1.99 | one-time |
| 開発者にピザをあげる | $2.99 | one-time |
| KPass AI 100パック | $3.99 | one-time |
| KPass Plus（買い切り） | $5.99 | one-time |


## Frequently asked questions

### Is Stack｜自己投資アプリ free?

Stack｜自己投資アプリ is free to download, with no in-app purchases.

### Is KPass(ケーパス) free?

KPass(ケーパス) is free to download, with in-app purchases available.

### Do Stack｜自己投資アプリ or KPass(ケーパス) have ads?

Neither Stack｜自己投資アプリ nor KPass(ケーパス) shows ads.

### Which is updated more often, Stack｜自己投資アプリ or KPass(ケーパス)?

Stack｜自己投資アプリ ships an update every 10 days, and KPass(ケーパス) weekly. Most recently, Stack｜自己投資アプリ was updated on September 28, 2026 and KPass(ケーパス) on September 29, 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.*