TachyMon vs Sippy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TachyMon
Receive immediate alerts for significant heart rate fluctuations, ideal for conditions like POTS or during exercise. Customize thresholds and receive detailed event tracking. Premium features offer advanced data visualization and reporting.
- Customizable heart rate threshold alerts
- Haptic feedback for alerts
- Real-time heart rate and average display
- Alert event tracking and logging
- Temporary alert silencing
- Detailed monitoring data review
- Shareable PDF reports (premium)
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Get rapid alerts for significant heart rate changes due to POTS, tachycardia, exercise or other activities. Features: - Haptic alerts based on custom threshold levels. - Customizable upper and lower threshold levels for current heart rate and difference from recent average. - The main display shows: current heart rate, moving average of recent heart rate, and delta of current heart rate to average. - Display colors change to show severity of alert. - The app tracks alert events with start time of event, event duration, starting average heart rate, and maximum or minimum heart rate during event. - Triple tap to temporarily silence alerts. - Review detailed monitoring data on the companion iPhone app. Premium features: - View detailed heart rate chart for each event - Share event info directly from watch, or export from iPhone to Photos app - Run monitoring sessions directly on your iPhone, without an Apple Watch, by connecting a Bluetooth heart rate sensor - Generate a shareable PDF report for each session - Add notes and symptoms to Alert Events - Export Alert Event raw heart rate data to .csv - View live session data on the iPhone companion app - View a summary of Alert Events over last week / month / year TachyMon was created by the developer for his niece Alex, who was diagnosed with Postural Orthostatic Tachycardia Syndrome (POTS) in the fall of 2021. Alex was experiencing frequent fainting, and her family noticed the episodes often followed a rapid rise in her heart rate. She wanted a heads-up the moment that started happening. Alex uses TachyMon's alerts as a cue to sit or crouch down when her heart rate climbs quickly, and she finds the app helps her feel a bit more in control of her day. It is a simple but specialized app, and we hope it may help others with POTS, or anyone who wants to be alerted to changes in their heart rate. APPLE HEALTH TachyMon integrates with the Apple Health app. TachyMon stores workout information (including heart rate) with the Apple Health app. WARNING: It is important to consult with medical professionals if you are concerned about your health. The TachyMon app is intended for informational purposes only. It is not a substitute for specialized medical care. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Sippy
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Sippy makes staying hydrated the easiest habit on your wrist. Open the app and you see your day as a glass filling with water: live, animated, and weirdly satisfying. Log a drink in one tap, glance at your progress from your watch face, and let smart reminders handle the rest. WHY IT WORKS - Your day is a glass: an animated water level shows exactly where you stand, with bubbles and all - One-tap logging: your own serving first, then glass, cup and bottle, or any amount you like - Ounces or millilitres: Sippy picks the unit for your region, and you can switch any time - Smart reminders: spread through your active hours, scheduled days ahead, quiet once you hit your goal, and stopped before bedtime, with Log and Snooze right on the notification - Hey Siri, log a drink in Sippy: hands free, and works with the Action button and Shortcuts - Coffee, tea, sparkling, milk and juice count at their hydration value, so you are never guessing - Apple Health: every drink can be added as water, so it shows on your iPhone without an iPhone app - A complication that says more: your next reminder, and whether you are on pace, in the Smart Stack when you fall behind - Streaks that motivate: hit your goal, grow the flame, and keep it with one streak freeze a week - Your month at a glance: a 30-day grid shows goal days, near misses, and rest days honestly MADE FOR THE WRIST Sippy is a true standalone watchOS app. No iPhone app required, no account, no setup beyond three quick questions. PRIVATE BY DESIGN Everything stays on your watch. No accounts, no analytics, no ads. Sippy never sees your data, and there is nothing to sign up for. FREE Every feature, free. No subscription, no in-app purchases, no ads.
Screenshots
Verdict
The clearest difference is in-app purchases: Sippy at none against TachyMon's 2. On price, update cadence, ads 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. TachyMon sells 2 in-app purchases, starting at $2.99 per month. Sippy asks for nothing beyond the download.
TachyMon ships an update every 3 months, Sippy every 2 months. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.
| Parameter | TachyMon | Sippy |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (286 ratings) — better | — |
| Positive reviews | 57.6% of reviews | — |
| Number of ratings | 286 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 36 MB | 2 MB |
| Age rating | 9+ | 4+ |
| Developer | Whip Development Inc. | XL Concepts |
Bugs and requests
TachyMon
Reported bugs
4 issues- Frequent disconnections from heart rate monitor
- Inconsistent data sync between watch and phone
- Inability to reinstall app on new devices
- Freezing and crashing issues on latest updates
Requested features
5 requests- Add ability to log symptoms and notes
- Implement emergency contact alerts
- Improve data export and sharing options
- Enhance graphing and trend analysis tools
- Optimize battery usage and background monitoring
Sippy
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TachyMon
- TachyMon Premium Monthly1 Month trial$2.991 Month
- TachyMon Premium Annual1 Month trial$19.991 Year
Sippy
No in-app purchases









