Don't Panic vs HeartCast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Don't Panic
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A calm, minimal breathing companion for the moments when your chest tightens and your thoughts won't slow down. No accounts. No ads. Just breath. TWO PROVEN TECHNIQUES 4-7-8 Breathing Inhale 4, hold 7, exhale 8. Trusted to calm the nervous system, ease anxiety, and help you fall asleep faster. Each phase is paired with a soft healing tone (528/432/396Hz). Box Breathing The technique used by Navy SEALs and first responders to stay calm under pressure. A perfect square that resets your mind in minutes. FEATURES - Pick your method and 5–20 repetitions, the app guides every phase. - Grounding tips and affirmations for the moments breathing alone isn't enough. - A private on-device journal for thoughts, triggers, and small wins. - Sessions log to Apple Health as Mindful Minutes. - Screen stays awake so you can set the phone down and follow along. PRIVACY FIRST No account. No tracking. No analytics. No third-party SDKs. Your notes and history stay on your device. Don't Panic only writes to HealthKit, it never reads anything. Breathe in. Breathe out. You've got this.
HeartCast
Broadcast your Apple Watch heart rate data in real-time to compatible cycling computers using Bluetooth. Offers direct or bridged modes for broad compatibility, with customizable heart rate zones and live updates on your iPhone's Dynamic Island and Lock Screen.
- Broadcast heart rate via BLE
- Direct and Bridge modes
- Real-time sync
- Customizable heart rate zones
- Dynamic Island & Lock Screen display
- Privacy-focused local processing
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BeatCast is a pure software solution that broadcasts real-time heart rate from your Apple Watch to cycling computers via Bluetooth Low Energy (BLE) — no chest strap needed. Key Features: • Direct Mode: Apple Watch broadcasts BLE heart rate signal directly. Search for "heart-watch" on your bike computer to connect. • Bridge Mode: Watch sends heart rate to iPhone, which broadcasts BLE signal (device name "heart-phone") for broader bike computer compatibility. • Real-time Sync: Watch and iPhone stay in sync via WatchConnectivity. • 5 Heart Rate Zones: Based on the Karvonen HRR formula, with customizable age and resting HR. • Dynamic Island & Lock Screen: Live heart rate, zone name, and connection status at a glance. • Privacy First: All data processed locally on device. No data uploaded to any server. Fully compliant with privacy regulations. Perfect for: • Monitoring heart rate on your bike computer while cycling • Replacing a traditional chest strap with just your Apple Watch • Tracking heart rate zones during indoor training
Screenshots
Verdict
The clearest difference is update cadence: HeartCast at daily against Don't Panic's weekly. HeartCast also leads on iOS requirement (16.0 vs 26.2). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
Don't Panic ships an update weekly, HeartCast daily. Both last shipped on October 31, 2026.
| Parameter | Don't Panic | HeartCast |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Weekly | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 26.2 | 16.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Tobias Helmrich | Sichuan Palm Cloud Technology Co., Ltd. |
In-app purchases
Don't Panic
No in-app purchases
HeartCast
No in-app purchases
