# option戦略 vs cRate Pro

The clearest difference is price: option戦略 at Free against cRate Pro's $0.99. option戦略 also leads on update cadence (every 3 weeks vs every 2 months). cRate Pro's advantage is in-app purchases (none vs 4) and review sentiment (90% vs 73%). On ads there is nothing between them.

option戦略 is free to download; cRate Pro costs $0.99 up front. option戦略 sells 4 in-app purchases, starting at $6.99 per month. cRate Pro asks for nothing beyond the download.

option戦略 ships an update every 3 weeks, cRate Pro every 2 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | option戦略 | cRate Pro |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[4.8 (148 ratings)](https://appshunter.io/ios/app/crate-pro-currency-converter/id909956791/reviews)** |
| Number of ratings | — | **148** |
| Positive reviews | 73.3% of reviews | **90.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 10 MB | 40 MB |
| Requires iOS | 15.4 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [MASAAKI SAKAIDA](https://appshunter.io/developer/626122800) | [良峰 侯](https://appshunter.io/developer/654444245) |

## What reviewers say

### option戦略

[App page](https://appshunter.io/ios/app/option/id626122797)

This system helps users strategize Nikkei 225 options trading. It allows for checking option information, considering strategies, and simulating positions. Premium features offer advanced charts and forecasts.

**Highlights:** IV Smile Curve and Delta/Gamma/Theta/Vega analysis, Option list with open interest and volume, Predefined and custom trading strategies, Position building and risk metric calculation, Futures price and IV simulation, Premium support charts and forecasts

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 自動更新 | $6.99 | per month |
| 自動更新 | $19.99 | per 3 months |
| 自動更新 | $29.99 | per 6 months |
| 自動更新 | $59.99 | per year |


### cRate Pro

[App page](https://appshunter.io/ios/app/crate-pro-currency-converter/id909956791)

Easily convert exchange rates for over 160 currencies with a custom keypad. Offers background rate updates, historical charts, and a built-in calculator for quick, multi-currency calculations. Supports Apple Watch and Dark Mode.

**Highlights:** 160+ currency support, Custom keypad for input, Background rate updates, Historical currency charts, Multi-currency calculations, Built-in calculator, Apple Watch compatibility

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast and quick
- ✨ Clean interface
- ✅ Accurate rates
- 🔄 Constantly updated

**What reviewers complain about**

- 🐛 Incorrect exchange rate for Bhutan
- ⚠️ Old Syrian flag
- 🎨 Interface slightly outdated
- 🌈 Difficult to read for colorblind users
- 📉 Charts load slowly

**Reported bugs**

- Bhutanese Ngultrum rate incorrect
- Old Syrian flag displayed
- App crashes when accessing settings
- BTC not working
- Cannot add single currency to profile

**Requested features**

- Change the old Syrian flag
- Add a widget
- Increase crypto currency options
- Add user-defined currency
- Improve chart loading speed


## Frequently asked questions

### Is option戦略 free?

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

### Is cRate Pro free?

cRate Pro costs $0.99, with no in-app purchases.

### Do option戦略 or cRate Pro have ads?

Neither option戦略 nor cRate Pro shows ads.

### Which is updated more often, option戦略 or cRate Pro?

option戦略 ships an update every 3 weeks, and cRate Pro every 2 months. Most recently, option戦略 was updated on November 6, 2026 and cRate Pro on November 6, 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.*