# Sandan Grading Plus vs XFoil

The clearest difference is price: XFoil at Free against Sandan Grading Plus's $10.99. XFoil also leads on update cadence (every 6 weeks vs every 18 months) and iOS requirement (13.0 vs 15.5). On ads, in-app purchases and device support there is nothing between them.

XFoil is free to download; Sandan Grading Plus costs $10.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sandan Grading Plus ships an update every 18 months, XFoil every 6 weeks. The most recent releases landed on September 16, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Sandan Grading Plus | XFoil |
| --- | --- | --- |
| Price | $10.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/xfoil/id1672661311/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 6 weeks** |
| Monetization | Paid | **Free** |
| Size | 19 MB | 51 MB |
| Requires iOS | 15.5 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gursharan Sahota](https://appshunter.io/developer/981462168) | [PLX Devices, INC.](https://appshunter.io/developer/388327605) |

## What reviewers say

### Sandan Grading Plus

[App page](https://appshunter.io/ios/app/sandan-grading-plus/id1125426794)

This app provides a comprehensive breakdown of 3rd Dan karate techniques, including stationary targets, Kumite sets, and all required 3rd Dan kata. It also features detailed bunkai (application analysis) for each kata and includes three advanced kata.

**Highlights:** 3rd Dan techniques breakdown, Stationary targets, Kihon Ippon Kumite sets, Jiyu Ippon Kumite sets, All 3rd Dan kata, Advanced kata included, Detailed kata bunkai

**Features:** macOS Compatibility

**In-app purchases:** none


### XFoil

[App page](https://appshunter.io/ios/app/xfoil/id1672661311)

Connect to your electric hydrofoil board to customize settings like motor power and throttle curves. Access training videos, manuals, and customer support resources. Tune your ride for optimal performance and safety.

**Highlights:** Bluetooth LE board connection, User setting customization, Motor power adjustment, Throttle curve tuning, Safety feature configuration, Training video library

**In-app purchases:** none


## Frequently asked questions

### Is Sandan Grading Plus free?

Sandan Grading Plus costs $10.99, with no in-app purchases.

### Is XFoil free?

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

### Do Sandan Grading Plus or XFoil have ads?

Neither Sandan Grading Plus nor XFoil shows ads.

### Which is updated more often, Sandan Grading Plus or XFoil?

Sandan Grading Plus ships an update every 18 months, and XFoil every 6 weeks. Most recently, Sandan Grading Plus was updated on September 16, 2026 and XFoil on September 9, 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.*