Raynaud vs RHRSpark
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Raynaud
This app allows individuals experiencing Raynaud's symptoms to meticulously log their attacks. Users can document episodes as they happen or recall past events. It also offers a daily diary feature and customizable reminders for notifications.
- Real-time attack logging
- Retrospective attack reporting
- Daily RCS diary completion
- Customizable notification reminders
- Attack tracking for Raynaud's symptoms
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This application helps users with Raynaud symptoms track the attacks. Users can record their attacks in real-time or retrospectively report attacks they have experienced. Additionally, users can complete the RCS diary at the end of the day and set up a reminder to receive a notification.
RHRSpark
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.
- 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
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RHRSpark puts your resting heart rate on your Apple Watch face as a sparkline, a gauge, or a corner complication. WHAT YOU GET • Three free 24-hour complications: a sparkline, a gauge, and a corner • Seven Pro complications across 8-hour, 7-day, and 30-day windows • Recent sedentary heart rate and Apple's daily resting heart rate, each labeled • Calculation notes for every complication in the iPhone gallery TWO SOURCES, SHOWN CLEARLY The 8-hour and 24-hour views use heart-rate samples that HealthKit labels as sedentary. The 7-day and 30-day views use Apple's daily resting heart rate. When there is no recent sedentary sample, the big number shows Apple's latest resting heart rate and says so. Longer gaps stay visible instead of being filled in. BUILT FOR THE WATCH FACE Choose rectangular, circular, or corner complications. A short HR or RHR label tells you which source you are seeing and leaves the sparkline the room. The Apple Watch app works without the iPhone app and keeps a record of your daily values. The iPhone app adds older days whenever you open it. ONE-TIME PRO UNLOCK Download free and use the three 24-hour complications. Unlock all ten with a single one-time purchase. No subscription, account, ads, or telemetry. PAIR IT WITH HRVSPARK HRVSpark gives the same direct view of raw SDNN heart rate variability across useful time windows. HealthKit data stays on your devices and moves only between your iPhone and Apple Watch through Apple frameworks. RHRSpark may request a small configuration file from filamentlabs.io to show current product messages. That request contains no health data. RHRSpark is for informational purposes only. It does not provide medical advice or diagnose, treat, cure, or prevent any medical condition.
Screenshots
Verdict
The clearest difference is in-app purchases: Raynaud at none against RHRSpark's 2. RHRSpark's advantage is update cadence (weekly vs every 5 months). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. RHRSpark sells 2 one-off in-app purchases. Raynaud asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Raynaud against 5.0 for RHRSpark. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Raynaud ships an update every 5 months, RHRSpark weekly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | Raynaud | RHRSpark |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 24 MB | 6 MB |
| Age rating | 12+ | 4+ |
| Developer | Bambang Parmanto | Joel Farthing |
Customer experience
Raynaud
RHRSpark
In-app purchases
Raynaud
No in-app purchases
RHRSpark
- RHRSpark Pro$0.99
- Tip Jar$2.99
