# STINU Position Size Calculator vs Sercus Pay

The clearest difference is in-app purchases: Sercus Pay at none against STINU Position Size Calculator's 1. STINU Position Size Calculator's advantage is update cadence (every 2 weeks vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. STINU Position Size Calculator sells 1 in-app purchase, starting at $18.99 per year. Sercus Pay asks for nothing beyond the download.

STINU Position Size Calculator ships an update every 2 weeks, Sercus Pay every 3 weeks. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | STINU Position Size Calculator | Sercus Pay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (834 ratings)](https://appshunter.io/ios/app/stinu-position-size-calculator/id1415292923/reviews)** | — |
| Number of ratings | **834** | — |
| Positive reviews | 45.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 60 MB | 50 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Black Tower Investments Ltd.](https://appshunter.io/developer/659419543) | [Sercus Inc.](https://appshunter.io/developer/1833644881) |

## What reviewers say

### STINU Position Size Calculator

[App page](https://appshunter.io/ios/app/stinu-position-size-calculator/id1415292923)

This app provides precise position sizing for Forex, commodities, and cryptocurrency trading using live market data. It helps traders eliminate errors and execute trades with confidence by accurately calculating trade size based on risk tolerance and stop-loss distances.

**Highlights:** Real-time market data for accurate calculations, Supports multiple account currencies, Fast calculation for multiple stop-loss distances, Calculations for commodities and crypto, Leverage independent risk calculation, Intuitive and clean user interface, Eliminates manual calculation errors

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $18.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 👍 Simple and accurate
- 🚀 Quick calculations
- 👍 Great for risk management
- 👍 Helpful for beginners

**What reviewers complain about**

- 🐛 Doesn't work on weekends
- 🐛 Inaccurate risk calculations
- 💰 Overpriced subscription
- 🐛 Frequent errors and bugs
- 🐛 Doesn't work with all currency pairs

**Reported bugs**

- Requests for market price fail
- Unable to enter decimal values for pips
- App crashes on certain devices
- Incorrect lot size calculations

**Requested features**

- Add support for indices (US30, NAS100, SPX500)
- Add support for cryptocurrencies and commodities
- Allow calculations outside of market hours
- Add a night mode/dark theme
- Implement saved profiles for different account sizes


### Sercus Pay

[App page](https://appshunter.io/ios/app/sercus-pay/id6751137892)

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

**In-app purchases:** none


## Frequently asked questions

### Is STINU Position Size Calculator free?

STINU Position Size Calculator is free to download, with in-app purchases available.

### Is Sercus Pay free?

Sercus Pay is free to download, with no in-app purchases.

### Do STINU Position Size Calculator or Sercus Pay have ads?

Neither STINU Position Size Calculator nor Sercus Pay shows ads.

### Which is updated more often, STINU Position Size Calculator or Sercus Pay?

STINU Position Size Calculator ships an update every 2 weeks, and Sercus Pay every 3 weeks. Most recently, STINU Position Size Calculator was updated on November 2, 2026 and Sercus Pay on November 5, 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.*