# XKM STL vs KO Flow

The clearest difference is in-app purchases: XKM STL at none against KO Flow's 2. XKM STL also leads on iOS requirement (14.0 vs 16.4). KO Flow's advantage is update cadence (every 3 days vs every 15 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. KO Flow sells 2 in-app purchases, starting at $6.99 per month. XKM STL asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for XKM STL against 5.0 for KO Flow. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

XKM STL ships an update every 15 months, KO Flow every 3 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | XKM STL | KO Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/xkm-stl/id6498709335/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/ko-flow-striking-workouts/id6814962651/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 47 MB | 205 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [XKM](https://appshunter.io/developer/1039914592) | [Mesmer LLC](https://appshunter.io/developer/1841654475) |

## What reviewers say

### XKM STL

[App page](https://appshunter.io/ios/app/xkm-stl/id6498709335)

This app connects martial arts enthusiasts with their instructors and community. Members can access training materials, track progress, register for events, and enroll in programs. It facilitates communication and provides easy access to class schedules.

**Highlights:** Instructor updates and insights, Event and program registration, On-the-go training curriculum access, Progress tracking (payment, rank, attendance), Community messaging, Class schedule viewing

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

**In-app purchases:** none


### KO Flow

[App page](https://appshunter.io/ios/app/ko-flow-striking-workouts/id6814962651)

This app offers guided voice workouts for boxing, kickboxing, Muay Thai, and karate. Choose your trainer, customize rounds, and follow combination callouts for shadowboxing or heavy bag training. It also includes fight studies and progress tracking.

**Highlights:** Voice-guided striking workouts, Boxing, kickboxing, Muay Thai, karate programs, Customizable round length and tempo, Build and save personal workouts, Fight Studies for technique analysis, Workout history and progress tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KO Flow Premium Monthly | $6.99 | per month |
| KO Flow Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is XKM STL free?

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

### Is KO Flow free?

KO Flow is free to download, with in-app purchases available.

### Which has better reviews, XKM STL or KO Flow?

XKM STL and KO Flow are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do XKM STL or KO Flow have ads?

Neither XKM STL nor KO Flow shows ads.

### Which is updated more often, XKM STL or KO Flow?

XKM STL ships an update every 15 months, and KO Flow every 3 days. Most recently, XKM STL was updated on November 4, 2026 and KO Flow on October 31, 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.*