# Selfloops Spark vs ErgZone

The clearest difference is review sentiment: ErgZone at 81% against Selfloops Spark's 26%. ErgZone also leads on rating (4.8 vs 2.7) and ratings volume (458 vs 13). Selfloops Spark's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Selfloops Spark sells 1 in-app purchase, starting at $69.99 per year and ErgZone sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ErgZone holds the better App Store score, 4.8 against 2.7. That said, the two scores are not equally well evidenced: ErgZone has 458 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 26% of Selfloops Spark's written reviews are positive against 81% of ErgZone's.

Selfloops Spark ships an update every 2 weeks, ErgZone every 2 months. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Selfloops Spark | ErgZone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (13 ratings)](https://appshunter.io/ios/app/selfloops-spark/id1282997660/reviews) | **[4.8 (458 ratings)](https://appshunter.io/ios/app/ergzone/id1474566270/reviews)** |
| Number of ratings | 13 | **458** |
| Positive reviews | 25.9% of reviews | **80.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 46 MB | 33 MB |
| Requires iOS | 18.0 | **13.4** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [SelfLoops](https://appshunter.io/developer/911739721) | [ERGZONE LLC](https://appshunter.io/developer/455154242) |

## 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 | $69.99 | per year |


### ErgZone

[App page](https://appshunter.io/ios/app/ergzone/id1474566270)

Optimize indoor training with real-time performance data, personalized pacing, and engaging challenges. Seamlessly integrates with various fitness machines, automating setup and providing critical metrics to enhance your workouts.

**Highlights:** Easy monitor setup, Live performance metrics, Smart interval pacing, Real-time workout alerts, Workout variety options, Performance history tracking, Community challenges

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EZ+ Monthly | $4.99 | per month |
| EZ+ Annual | $49.99 | per year |

**What reviewers like**

- 👍 Easy workout programming
- 🚀 Seamless Concept2 integration
- 💡 Comprehensive metrics and data
- 👍 User-friendly interface
- ❤️ Responsive developers

**What reviewers complain about**

- 💰 Expensive subscription
- 🚫 No lifetime membership option
- ⚠️ Poor UI for logbook/rankings
- ❌ Incompatible with WaterRower
- ❓ Confusing group membership for premium features

**Reported bugs**

- Heart monitor sync issues with Samsung Galaxy watch
- Workouts not appearing in logbook when connected to ErgData
- Inaccurate total time in uploads
- Rest distance not included in Strava upload
- Group membership premium features unclear

**Requested features**

- Sync with Samsung Galaxy watch
- Add a beep function for interval changes
- Confirmation pop-up for unsaved workout changes
- Require unique names for workouts
- Apple Health integration


## Frequently asked questions

### Is Selfloops Spark free?

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

### Is ErgZone free?

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

### Which has better reviews, Selfloops Spark or ErgZone?

ErgZone is rated higher. Selfloops Spark averages 2.7 out of 5 from 13 ratings, while ErgZone averages 4.8 from 458 ratings.

### Do Selfloops Spark or ErgZone have ads?

Neither Selfloops Spark nor ErgZone shows ads.

### Which is updated more often, Selfloops Spark or ErgZone?

Selfloops Spark ships an update every 2 weeks, and ErgZone every 2 months. Most recently, Selfloops Spark was updated on September 21, 2026 and ErgZone on September 18, 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.*