# LSF HRM vs HIIT Dual Timer

The clearest difference is rating: LSF HRM at 4.5 against HIIT Dual Timer's 3.0. LSF HRM also leads on ratings volume (4 vs 1). HIIT Dual Timer's advantage is update cadence (every 5 days vs every 11 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

LSF HRM holds the better App Store score, 4.5 against 3.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

LSF HRM ships an update every 11 months, HIIT Dual Timer every 5 days. The most recent releases landed on June 1, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | LSF HRM | HIIT Dual Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4 ratings)](https://appshunter.io/ios/app/lsf-hrm/id1318116053/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/hiit-dual-timer/id1505262060/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 40 MB | 1 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nci Technology Inc.](https://appshunter.io/developer/868272704) | [BWorby Works](https://appshunter.io/developer/546372907) |

## What reviewers say

### LSF HRM

[App page](https://appshunter.io/ios/app/lsf-hrm/id1318116053)

Track your fitness progress with this app. It allows you to record out-of-club workouts, monitor your intensity with a unique points system, and view real-time heart rate and calorie burn. Track weight loss and activity via a Bluetooth monitor.

**Highlights:** Record out-of-club workouts, Track progress over time, Measure intensity with points system, Monitor real-time heart rate zones, View calorie burn per minute, Track activity via Bluetooth monitor

**In-app purchases:** none


### HIIT Dual Timer

[App page](https://appshunter.io/ios/app/hiit-dual-timer/id1505262060)

This interval timer allows you to set custom durations for work and rest periods, and then repeat them for a specified number of rounds. It's designed for high-intensity interval training and other timed activities.

**Highlights:** Customizable work intervals, Customizable rest intervals, Set number of rounds, Simple start and go functionality, Ideal for HIIT workouts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LSF HRM free?

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

### Is HIIT Dual Timer free?

HIIT Dual Timer is free to download, with no in-app purchases.

### Which has better reviews, LSF HRM or HIIT Dual Timer?

LSF HRM is rated higher. LSF HRM averages 4.5 out of 5 from 4 ratings, while HIIT Dual Timer averages 3.0 from 1 ratings.

### Do LSF HRM or HIIT Dual Timer have ads?

Neither LSF HRM nor HIIT Dual Timer shows ads.

### Which is updated more often, LSF HRM or HIIT Dual Timer?

LSF HRM ships an update every 11 months, and HIIT Dual Timer every 5 days. Most recently, LSF HRM was updated on June 1, 2026 and HIIT Dual Timer on June 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*