# 株カレンダー vs Order Book Trainer

The clearest difference is update cadence: 株カレンダー at every 5 days against Order Book Trainer's every 3 weeks. 株カレンダー also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 株カレンダー sells 2 in-app purchases, starting at $2.99 per month and Order Book Trainer sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

株カレンダー ships an update every 5 days, Order Book Trainer every 3 weeks. The most recent releases landed on September 9, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 株カレンダー | Order Book Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 107 MB | 42 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ikue Konno](https://appshunter.io/developer/971968281) | [Syncly Applications](https://appshunter.io/developer/1437712077) |

## What reviewers say

### 株カレンダー

[App page](https://appshunter.io/ios/app/ai/id6754214036)

This tool provides Japanese stock investors with real-time notifications for corporate disclosures, AI-powered summaries of filings, and integrated calendar management for earnings and IPO schedules. It helps streamline information gathering and investment decision-making.

**Highlights:** Real-time disclosure notifications, AI-powered filing summaries, Earnings and IPO calendar management, Favorite stock tracking with reminders, Customizable stock grouping, IR disclosure notes and investment journal

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $2.99 | per month |
| ライフタイムプレミアムプラン | $39.99 | one-time |


### Order Book Trainer

[App page](https://appshunter.io/ios/app/order-book-trainer-level-2/id6785885996)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-Free Pro – Monthly | $1.99 | per month |
| Ad-Free Pro – Yearly | $15.99 | per year |


## Frequently asked questions

### Is 株カレンダー free?

株カレンダー is free to download, with in-app purchases available.

### Is Order Book Trainer free?

Order Book Trainer is free to download, with in-app purchases available.

### Do 株カレンダー or Order Book Trainer have ads?

Both 株カレンダー and Order Book Trainer show ads.

### Which is updated more often, 株カレンダー or Order Book Trainer?

株カレンダー ships an update every 5 days, and Order Book Trainer every 3 weeks. Most recently, 株カレンダー was updated on September 9, 2026 and Order Book Trainer on September 19, 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.*