# The Core Effect vs STOLLA

The clearest difference is in-app purchases: The Core Effect at none against STOLLA's 1. STOLLA's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. STOLLA sells 1 in-app purchase, starting at $299.99 per month. The Core Effect asks for nothing beyond the download.

The Core Effect ships an update every 2 months, STOLLA every 3 months. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | The Core Effect | STOLLA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stolla/id6749359147/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 421 MB | 55 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Alexandra Woodall](https://appshunter.io/developer/1732208972) | [Robert Stols](https://appshunter.io/developer/1830185383) |

## What reviewers say

### The Core Effect

[App page](https://appshunter.io/ios/app/the-core-effect/id6478200604)

**Features:** macOS Compatibility

**In-app purchases:** none


### STOLLA

[App page](https://appshunter.io/ios/app/stolla/id6749359147)

This platform supports your entire athletic training camp journey, from preparation to post-camp guidance. It offers personalized training plans, strength and conditioning sessions with video breakdowns, and tools to track progress, habits, sleep, and recovery. Stay connected with your coach through weekly check-ins and in-app chat.

**Highlights:** Personalized training plans, Strength and conditioning sessions, Video breakdowns of exercises, Progress tracking, Post-camp guidance, In-app chat with coach, Habit, sleep, and recovery logging

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STOLLA 3-Month Coaching Plan | $299.99 | per month |


## Frequently asked questions

### Is The Core Effect free?

The Core Effect is free to download, with no in-app purchases.

### Is STOLLA free?

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

### Do The Core Effect or STOLLA have ads?

Neither The Core Effect nor STOLLA shows ads.

### Which is updated more often, The Core Effect or STOLLA?

The Core Effect ships an update every 2 months, and STOLLA every 3 months. Most recently, The Core Effect was updated on October 6, 2026 and STOLLA on October 7, 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.*