# FX_最適ロット計算機～許容損失額を一定にするアプリ vs FX LotSize

The clearest difference is ads: FX LotSize at none against FX_最適ロット計算機～許容損失額を一定にするアプリ's shown. FX LotSize also leads on update cadence (every 3 days vs every 3 months). FX_最適ロット計算機～許容損失額を一定にするアプリ's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price and in-app purchases there is nothing between them.

Both are free to download. FX_最適ロット計算機～許容損失額を一定にするアプリ sells 1 in-app purchase, starting at $2.99 per month and FX LotSize sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

FX_最適ロット計算機～許容損失額を一定にするアプリ ships an update every 3 months, FX LotSize every 3 days. The most recent releases landed on September 14, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | FX_最適ロット計算機～許容損失額を一定にするアプリ | FX LotSize |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 8 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Koji Watanabe](https://appshunter.io/developer/1332653587) | [yuki kawahito](https://appshunter.io/developer/1668178650) |

## What reviewers say

### FX_最適ロット計算機～許容損失額を一定にするアプリ

[App page](https://appshunter.io/ios/app/fx/id1566085690)

Calculate optimal trade lot sizes based on your acceptable loss amount. This app helps manage risk for Forex and CFD trading, making it suitable for beginners. It supports various currencies, indices, and CFD sizes for precise position adjustments.

**Highlights:** Calculate lot size from acceptable loss, Supports Forex, Gold, Nikkei 225, and Dow Jones, Handles various currency and CFD sizes, Rounds lot numbers to the second decimal place, Real-time position size calculation, Supports stop-loss price for lot calculation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム機能 | $2.99 | per month |


### FX LotSize

[App page](https://appshunter.io/ios/app/fx-lotsize/id6445845651)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Currency Pair | $5.99 | one-time |


## Frequently asked questions

### Is FX_最適ロット計算機～許容損失額を一定にするアプリ free?

FX_最適ロット計算機～許容損失額を一定にするアプリ is free to download, with in-app purchases available.

### Is FX LotSize free?

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

### Do FX_最適ロット計算機～許容損失額を一定にするアプリ or FX LotSize have ads?

FX_最適ロット計算機～許容損失額を一定にするアプリ shows ads; FX LotSize does not.

### Which is updated more often, FX_最適ロット計算機～許容損失額を一定にするアプリ or FX LotSize?

FX_最適ロット計算機～許容損失額を一定にするアプリ ships an update every 3 months, and FX LotSize every 3 days. Most recently, FX_最適ロット計算機～許容損失額を一定にするアプリ was updated on September 14, 2026 and FX LotSize 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.*