WHILL Model Ci vs TachyMon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WHILL Model Ci
Control a personal electric vehicle remotely, monitor travel distance and total mileage, and adjust speed settings. This application enhances the user experience for the WHILL Model Ci.
- Remote control functionality
- Track traveling distance
- Monitor total mileage
- Adjust speed settings
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* It is an app dedicated of WHILL Model Ci. You can do with this app: · Remotely control · Browse traveling distance, total mileage · It is possible to change speed
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/
Screenshots
Verdict
WHILL Model Ci and TachyMon both sit at 3.6 stars, but that hides the real split: 58% of TachyMon's written reviews are positive against 0% of WHILL Model Ci's. TachyMon also leads on update cadence (every 3 months vs every 13 months) and ratings volume (288 vs 11). WHILL Model Ci's advantage is in-app purchases (none vs 2) and iOS requirement (10.0 vs 16.4). On price, rating, 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. WHILL Model Ci asks for nothing beyond the download.
TachyMon holds the better App Store score, 3.8 against 3.6. That said, the two scores are not equally well evidenced: TachyMon has 288 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 0% of WHILL Model Ci's written reviews are positive against 58% of TachyMon's.
WHILL Model Ci ships an update every 13 months, TachyMon every 3 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | WHILL Model Ci | TachyMon |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (11 ratings) | 3.8 (288 ratings) — better |
| Positive reviews | 0.0% of reviews | 58.0% of reviews — better |
| Number of ratings | 11 | 288 — better |
| Update frequency | Every 13 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 10.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 65 MB | 36 MB |
| Age rating | 4+ | 9+ |
| Developer | WHILL, Inc. | Whip Development Inc. |
Customer experience
WHILL Model Ci
TachyMon
Bugs and requests
WHILL Model Ci
Not enough reviews yet to summarise bugs or 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
In-app purchases
WHILL Model Ci
No in-app purchases
TachyMon
- TachyMon Premium Monthly1 Month trial$2.991 Month
- TachyMon Premium Annual1 Month trial$19.991 Year
