# RHRSpark vs Longevity Arc

The clearest difference is iOS requirement: Longevity Arc at 15.1 against RHRSpark's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. RHRSpark sells 2 one-off in-app purchases and Longevity Arc sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

RHRSpark ships an update every 5 days, Longevity Arc every 3 days. Both last shipped on October 7, 2026.

## The numbers

| Metric | RHRSpark | Longevity Arc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rhrspark/id6762872980/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 40 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Joel Farthing](https://appshunter.io/developer/1879704683) | [Radoslaw Jozefowicz](https://appshunter.io/developer/1859278240) |

## What reviewers say

### RHRSpark

[App page](https://appshunter.io/ios/app/rhrspark/id6762872980)

Visualize your resting heart rate directly on your Apple Watch face with customizable complications. Choose from various styles and time windows to see your heart rate trends at a glance. Understand how your data is calculated with full transparency.

**Highlights:** Resting heart rate on watch face, Sparkline, gauge, or corner complications, 10 watch face complications, 4 time window options (8H, 24H, 7D, 30D), Two distinct data sources, Full calculation transparency

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RHRSpark Pro | $0.99 | one-time |
| Tip Jar | $4.99 | one-time |


### Longevity Arc

[App page](https://appshunter.io/ios/app/longevity-arc/id6766045106)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $2.99 | per month |
| Lifetime Pro | $9.99 | one-time |


## Frequently asked questions

### Is RHRSpark free?

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

### Is Longevity Arc free?

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

### Do RHRSpark or Longevity Arc have ads?

Neither RHRSpark nor Longevity Arc shows ads.

### Which is updated more often, RHRSpark or Longevity Arc?

RHRSpark ships an update every 5 days, and Longevity Arc every 3 days. Most recently, RHRSpark was updated on October 7, 2026 and Longevity Arc on October 7, 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.*