# Spark Direct vs CTS ActivityLab

The clearest difference is in-app purchases: Spark Direct at none against CTS ActivityLab's 1. Spark Direct also leads on ratings volume (19 vs 1) and iOS requirement (15.1 vs 17.0). CTS ActivityLab's advantage is update cadence (every 2 days vs every 2 months) and rating (5.0 vs 4.8). On price, ads and device support there is nothing between them.

Both are free to download. CTS ActivityLab sells 1 in-app purchase, starting at $1.99 per month. Spark Direct asks for nothing beyond the download.

CTS ActivityLab holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Spark Direct has 19 ratings behind it against 1, so its average is the more settled of the two.

Spark Direct ships an update every 2 months, CTS ActivityLab every 2 days. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Spark Direct | CTS ActivityLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (19 ratings)](https://appshunter.io/ios/app/spark-direct/id1509813684/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cts-activitylab/id6786826686/reviews)** |
| Number of ratings | **19** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | **Free** | Freemium |
| Size | 51 MB | 9 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 12+ | 4+ |
| Developer | [Limbix](https://appshunter.io/developer/1205665112) | [CTS Media Group LLC](https://appshunter.io/developer/6786826688) |

## What reviewers say

### Spark Direct

[App page](https://appshunter.io/ios/app/spark-direct/id1509813684)

This app offers guided lessons and interactive exercises designed by psychology experts and individuals with low mood. It helps users understand their emotions, mood patterns, and behaviors to improve their overall well-being.

**Highlights:** Expert-guided lessons, Interactive exercises, Mood tracking, Emotion insights, Behavioral analysis, Low mood support

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

**In-app purchases:** none


### CTS ActivityLab

[App page](https://appshunter.io/ios/app/cts-activitylab/id6786826686)

Analyze detailed fitness data from various sports devices. Compare multiple activities, inspect GPS accuracy, and visualize routes and statistics with powerful charts. Gain insights beyond basic watch metrics.

**Highlights:** Compare multiple activities side-by-side, Import activities from Apple Health, Analyze GPS accuracy and track quality, Inspect elevation and altitude data, Review sensor metrics (heart rate, pace, etc.), Visualize routes and statistics with charts, Compare device accuracy with custom algorithm

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CTS ActiveLab Monthly | $1.99 | per month |


## Frequently asked questions

### Is Spark Direct free?

Spark Direct is free to download, with no in-app purchases.

### Is CTS ActivityLab free?

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

### Which has better reviews, Spark Direct or CTS ActivityLab?

CTS ActivityLab is rated higher. Spark Direct averages 4.8 out of 5 from 19 ratings, while CTS ActivityLab averages 5.0 from 1 ratings.

### Do Spark Direct or CTS ActivityLab have ads?

Neither Spark Direct nor CTS ActivityLab shows ads.

### Which is updated more often, Spark Direct or CTS ActivityLab?

Spark Direct ships an update every 2 months, and CTS ActivityLab every 2 days. Most recently, Spark Direct was updated on October 8, 2026 and CTS ActivityLab on October 10, 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.*