# Kahunas vs Flex Foundry

The clearest difference is rating: Flex Foundry at 5.0 against Kahunas's 3.3. Kahunas's advantage is ratings volume (73 vs 2) and monetization model (free with in-app purchases vs paid). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Kahunas sells 1 in-app purchase, starting at $95.99 per month and Flex Foundry sells 1 in-app purchase, starting at $200.00 per month. Whichever you choose, the download price is not the number that matters.

Flex Foundry holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Kahunas has 73 ratings behind it against 2, so its average is the more settled of the two.

Kahunas ships an update monthly, Flex Foundry every 2 months. The most recent releases landed on September 22, 2026 and June 12, 2026 respectively.

## The numbers

| Metric | Kahunas | Flex Foundry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (73 ratings)](https://appshunter.io/ios/app/kahunas/id1638377758/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flex-foundry/id6503705212/reviews)** |
| Number of ratings | **73** | 2 |
| Positive reviews | 18.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 51 MB | 52 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Mark Covey-Fox](https://appshunter.io/developer/1594397925) | [John Raulston](https://appshunter.io/developer/1750011329) |

## What reviewers say

### Kahunas

[App page](https://appshunter.io/ios/app/kahunas/id1638377758)

This app connects clients with their online coaches. Coaches can manage clients, update plans, and communicate directly. Clients can log workouts, track nutrition, and message their coach.

**Highlights:** Client management, Workout and diet plan updates, Check-in tracking, Direct messaging, Workout logging, Nutrition plan viewing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $95.99 | per month |

**What reviewers like**

- 👍 User-friendly interface for clients
- 🎯 All-in-one coaching platform (workouts, nutrition, messaging)
- 📊 Customizable workout programming
- 💬 Easy coach-client communication
- 🔄 Regular updates and improvements

**What reviewers complain about**

- 🐛 Frequent crashes and freezes
- 🐛 Persistent bugs despite updates
- ❌ Poor Apple Health integration (doesn't sync weight/workouts)
- ❌ Unreliable data persistence (lost workout data)
- ❌ Inaccurate nutrition database

**Reported bugs**

- App crashes when locking phone
- Crashes during workout logging
- Login screen freezes
- Barcode scanner launches blank screen
- Rest timer displays incorrect duration

**Requested features**

- Apple Watch integration and complications
- MyFitnessPal integration
- Save/reuse meal feature
- Auto-save functionality for workouts
- Weight tracking widget


### Flex Foundry

[App page](https://appshunter.io/ios/app/flex-foundry/id6503705212)

This app offers personalized meal plans and workout routines designed to help you achieve your fitness goals. It provides weekly check-ins and expert guidance for a results-driven approach to health and wellness.

**Highlights:** Custom meal plans, Tailored workout routines, Weekly check-ins, Personalized feedback, Expert guidance, Accountability support

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Coaching | $200.00 | per month |


## Frequently asked questions

### Is Kahunas free?

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

### Is Flex Foundry free?

Flex Foundry is free to download, with in-app purchases available.

### Which has better reviews, Kahunas or Flex Foundry?

Flex Foundry is rated higher. Kahunas averages 3.3 out of 5 from 73 ratings, while Flex Foundry averages 5.0 from 2 ratings.

### Do Kahunas or Flex Foundry have ads?

Neither Kahunas nor Flex Foundry shows ads.

### Which is updated more often, Kahunas or Flex Foundry?

Kahunas ships an update monthly, and Flex Foundry every 2 months. Most recently, Kahunas was updated on September 22, 2026 and Flex Foundry on June 12, 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.*