# ChainFlow vs XtrkR

The clearest difference is update cadence: XtrkR at every 5 days against ChainFlow's every 2 months. XtrkR also leads on ratings volume (3 vs 1). ChainFlow's advantage is rating (5.0 vs 4.7). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. ChainFlow sells 1 one-off in-app purchase and XtrkR sells 10 in-app purchases, starting at $49.99 per year. Whichever you choose, the download price is not the number that matters.

ChainFlow holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

ChainFlow ships an update every 2 months, XtrkR every 5 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ChainFlow | XtrkR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chainflow-interval-timer/id6755700190/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/xtrkr-private-prep-and-sti/id6760680065/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Freemium | Freemium |
| Size | 22 MB | 359 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Michael Ebako-Hodgson](https://appshunter.io/developer/1855675493) | [De Nihil LLC](https://appshunter.io/developer/1885692377) |

## What reviewers say

### ChainFlow

[App page](https://appshunter.io/ios/app/chainflow-interval-timer/id6755700190)

Create highly customized interval timers for any routine, from HIIT workouts to study sessions. Set unique work and rest periods for each segment, with clear audio cues and a distraction-free interface. Save your routines for easy access and hands-free operation.

**Highlights:** Custom interval chaining, Adjustable work/rest times per interval, Clear audio cues, Hands-free operation, Screen-off functionality, Routine saving, Dark interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChainFlow Pro | $4.99 | one-time |


### XtrkR

[App page](https://appshunter.io/ios/app/xtrkr-private-prep-and-sti/id6760680065)

A private sexual health tracker for gay and bi men, offering comprehensive tools for managing PrEP, STI tests, vaccinations, and sexual encounters. It prioritizes user privacy with on-device data storage and no account requirements.

**Highlights:** Injectable PrEP tracking (Apretude, Yeztugo), Daily and on-demand PrEP regimens, DoxyPEP and PEP course tracking, Site-specific STI test logging, Vaccination and dose series tracking, Encounter logging with protection details, On-device data storage for privacy

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| XtrkR+ | $49.99 | per year |
| Elements Icon Collection | $2.99 | one-time |
| Flags Icon Collection | $2.99 | one-time |
| Pride Icon Collection | $2.99 | one-time |
| Leather Icon Collection | $2.99 | one-time |
| Tip: Dinner Out | $9.99 | one-time |
| Year in Review | $9.99 | one-time |
| Tip: A Weekend | $49.99 | one-time |
| Founding Tester (Invite Only) | $199.99 | one-time |
| XtrkR Premium | $199.99 | one-time |


## Frequently asked questions

### Is ChainFlow free?

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

### Is XtrkR free?

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

### Which has better reviews, ChainFlow or XtrkR?

ChainFlow is rated higher. ChainFlow averages 5.0 out of 5 from 1 ratings, while XtrkR averages 4.7 from 3 ratings.

### Do ChainFlow or XtrkR have ads?

Neither ChainFlow nor XtrkR shows ads.

### Which is updated more often, ChainFlow or XtrkR?

ChainFlow ships an update every 2 months, and XtrkR every 5 days. Most recently, ChainFlow was updated on October 30, 2026 and XtrkR on October 31, 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.*