# FX LotSize vs FX Lot Size Calculator

The clearest difference is update cadence: FX LotSize at every 3 days against FX Lot Size Calculator's every 3 weeks. FX LotSize also leads on iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. FX LotSize sells 1 one-off in-app purchase and FX Lot Size Calculator sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

FX LotSize ships an update every 3 days, FX Lot Size Calculator every 3 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | FX LotSize | FX Lot Size Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fx-lot-size-calculator-flex/id6753135872/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | — | Subscription |
| Size | 8 MB | 14 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [yuki kawahito](https://appshunter.io/developer/1668178650) | [Christoph Stadelbauer](https://appshunter.io/developer/1746084312) |

## What reviewers say

### 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 |


### FX Lot Size Calculator

[App page](https://appshunter.io/ios/app/fx-lot-size-calculator-flex/id6753135872)

Calculate forex and gold position sizes quickly and accurately on your mobile device. This tool helps traders size their trades correctly in seconds, offering broker and leverage independence with real-time market data.

**Highlights:** Quick pair selection, Broker independent, Leverage independent, Real-time market data, Account data saved

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FleX Premium | $2.99 | per 7 days |
| FleX Premium | $9.99 | per year |
| FleX Premium Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is FX LotSize free?

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

### Is FX Lot Size Calculator free?

FX Lot Size Calculator is free to download, with in-app purchases available.

### Do FX LotSize or FX Lot Size Calculator have ads?

Neither FX LotSize nor FX Lot Size Calculator shows ads.

### Which is updated more often, FX LotSize or FX Lot Size Calculator?

FX LotSize ships an update every 3 days, and FX Lot Size Calculator every 3 weeks. Most recently, FX LotSize was updated on October 22, 2026 and FX Lot Size Calculator on October 24, 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.*