# Action Tracer vs CentrFitDS

Action Tracer and CentrFitDS are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Action Tracer ships an update weekly, CentrFitDS every 5 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Action Tracer | CentrFitDS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 73 MB | 53 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [学斌 赵](https://appshunter.io/developer/1514555505) | [Leotrin Elmazi](https://appshunter.io/developer/1011424680) |

## What reviewers say

### Action Tracer

[App page](https://appshunter.io/ios/app/action-tracer/id6465174912)

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

**In-app purchases:** none


### CentrFitDS

[App page](https://appshunter.io/ios/app/centrfitds/id6746205624)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Action Tracer free?

Action Tracer is free to download, with no in-app purchases.

### Is CentrFitDS free?

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

### Do Action Tracer or CentrFitDS have ads?

Neither Action Tracer nor CentrFitDS shows ads.

### Which is updated more often, Action Tracer or CentrFitDS?

Action Tracer ships an update weekly, and CentrFitDS every 5 days. Most recently, Action Tracer was updated on October 30, 2026 and CentrFitDS on October 28, 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.*