# Selfloops Spark vs SPINPower® Crank Connect

The clearest difference is in-app purchases: SPINPower® Crank Connect at none against Selfloops Spark's 1. SPINPower® Crank Connect also leads on review sentiment (57% vs 26%). Selfloops Spark's advantage is update cadence (every 2 weeks vs every 3 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Selfloops Spark sells 1 in-app purchase, starting at $99.99 per year. SPINPower® Crank Connect asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 2.7 for Selfloops Spark against 2.7 for SPINPower® Crank Connect. Both are backed by a comparable volume of ratings — 13 and 12 respectively. Written reviews are what separate them: 26% of Selfloops Spark's written reviews are positive against 57% of SPINPower® Crank Connect's.

Selfloops Spark ships an update every 2 weeks, SPINPower® Crank Connect every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Selfloops Spark | SPINPower® Crank Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (13 ratings)](https://appshunter.io/ios/app/selfloops-spark/id1282997660/reviews)** | [2.7 (12 ratings)](https://appshunter.io/ios/app/spinpower-crank-connect/id1440511385/reviews) |
| Number of ratings | **13** | 12 |
| Positive reviews | 25.9% of reviews | **57.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 44 MB | 10 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [SelfLoops](https://appshunter.io/developer/911739721) | [Mad Dogg Athletics, Inc.](https://appshunter.io/developer/597896675) |

## What reviewers say

### Selfloops Spark

[App page](https://appshunter.io/ios/app/selfloops-spark/id1282997660)

This app helps athletes and fitness enthusiasts track, analyze, and optimize their workouts. It offers personalized training plans, goal setting, and performance insights. Connect with coaches and other users for motivation and feedback.

**Highlights:** Workout tracking and analysis, Fitness challenges and goal setting, Personalized training plans, Heart rate monitoring, RPE logging, Data syncing with Apple Health, Advanced performance analytics

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Athlete Premium | $99.99 | per year |


### SPINPower® Crank Connect

[App page](https://appshunter.io/ios/app/spinpower-crank-connect/id1440511385)

This application connects to a specific type of fitness crank to calibrate it, update its firmware, and manage its settings. It displays essential information like serial number, battery level, and ANT+ ID for each connected device.

**Highlights:** Crank calibration, Firmware updates, Device naming, Serial number display, Battery level monitoring, ANT+ ID display

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Selfloops Spark free?

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

### Is SPINPower® Crank Connect free?

SPINPower® Crank Connect is free to download, with no in-app purchases.

### Which has better reviews, Selfloops Spark or SPINPower® Crank Connect?

Selfloops Spark is rated higher. Selfloops Spark averages 2.7 out of 5 from 13 ratings, while SPINPower® Crank Connect averages 2.7 from 12 ratings.

### Do Selfloops Spark or SPINPower® Crank Connect have ads?

Neither Selfloops Spark nor SPINPower® Crank Connect shows ads.

### Which is updated more often, Selfloops Spark or SPINPower® Crank Connect?

Selfloops Spark ships an update every 2 weeks, and SPINPower® Crank Connect every 3 months. Most recently, Selfloops Spark was updated on October 24, 2026 and SPINPower® Crank Connect on October 24, 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.*