# HeartRateHub vs ZoneFlow

The clearest difference is in-app purchases: ZoneFlow at none against HeartRateHub's 3. ZoneFlow also leads on iOS requirement (13.0 vs 16.0). HeartRateHub's advantage is update cadence (every 4 months vs every 18 months). On price, ads and device support there is nothing between them.

Both are free to download. HeartRateHub sells 3 in-app purchases, starting at $1.99 per 7 days. ZoneFlow asks for nothing beyond the download.

HeartRateHub ships an update every 4 months, ZoneFlow every 18 months. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | HeartRateHub | ZoneFlow |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 18 months |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 2 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Enzer Erkin](https://appshunter.io/developer/1545061957) | [Adrian Rollett](https://appshunter.io/developer/1776487100) |

## What reviewers say

### HeartRateHub

[App page](https://appshunter.io/ios/app/heartratehub/id6477622582)

This app helps runners train smarter by utilizing personalized heart rate zones. It integrates with Apple Watch to provide real-time feedback and allows for the creation of custom or pre-set interval workouts for improved endurance and speed.

**Highlights:** Custom heart rate zone creation, Flexible interval workout design, Predefined zone templates, Apple Watch real-time feedback, Speedometer-style visual display, Data-driven goal-oriented sessions

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly Subscription | $3.99 | per month |
| Yearly Subscription | $24.99 | per year |


### ZoneFlow

[App page](https://appshunter.io/ios/app/zoneflow/id6739025069)

**In-app purchases:** none


## Frequently asked questions

### Is HeartRateHub free?

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

### Is ZoneFlow free?

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

### Do HeartRateHub or ZoneFlow have ads?

Neither HeartRateHub nor ZoneFlow shows ads.

### Which is updated more often, HeartRateHub or ZoneFlow?

HeartRateHub ships an update every 4 months, and ZoneFlow every 18 months. Most recently, HeartRateHub was updated on October 14, 2026 and ZoneFlow 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.*