# ReViiV vs TachyMon

The clearest difference is rating: ReViiV at 4.5 against TachyMon's 3.8. ReViiV also leads on review sentiment (75% vs 58%) and update cadence (monthly vs every 3 months). TachyMon's advantage is ratings volume (288 vs 8). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. ReViiV sells 2 in-app purchases, starting at $0.99 per month and TachyMon sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReViiV holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: TachyMon has 288 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 75% of ReViiV's written reviews are positive against 58% of TachyMon's.

ReViiV ships an update monthly, TachyMon every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | ReViiV | TachyMon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (8 ratings)](https://appshunter.io/ios/app/reviiv/id1557588292/reviews)** | [3.8 (288 ratings)](https://appshunter.io/ios/app/tachymon/id1603517412/reviews) |
| Number of ratings | 8 | **288** |
| Positive reviews | **75.0% of reviews** | 58.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 25 MB | 36 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 12+ | 9+ |
| Developer | [Martysoft LLC](https://appshunter.io/developer/1493293014) | [Whip Development Inc.](https://appshunter.io/developer/1603514887) |

## What reviewers say

### ReViiV

[App page](https://appshunter.io/ios/app/reviiv/id1557588292)

This app offers customized daily breathing exercises designed to alleviate post-viral symptoms like fatigue, brain fog, and loss of taste/smell. It utilizes scientifically backed techniques across 16 progressive stages to promote steady improvement and symptom relief.

**Highlights:** Customized daily breathing exercises, 16 progressive stages for improvement, Relief from fatigue, brain fog, taste/smell loss, 8 scientifically backed techniques, Weekly progress assessments and graphs, Detailed guides and technique resources

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Long Haul Breathing Therapy | $0.99 | per month |
| Long Haul Breathing Therapy | $6.99 | per year |


### TachyMon

[App page](https://appshunter.io/ios/app/tachymon/id1603517412)

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.

**Highlights:** 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)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TachyMon Premium Monthly | $2.99 | per month |
| TachyMon Premium Annual | $19.99 | per year |

**What reviewers like**

- 🚀 Continuous monitoring
- 🚨 Helpful alerts for heart rate spikes/drops
- 📊 Useful data tracking and visualization
- 🤖 Customizable settings and thresholds
- 💯 Accurate heart rate measurements

**What reviewers complain about**

- 🔋 Drains Apple Watch battery quickly
- 🔒 Paywalled features that were previously free
- 🤯 Buggy and unreliable at times
- 📱 Lack of companion iPhone app for data review
- 🔇 Limited notification/alert customization

**Reported bugs**

- 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**

- 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


## Frequently asked questions

### Is ReViiV free?

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

### Is TachyMon free?

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

### Which has better reviews, ReViiV or TachyMon?

ReViiV is rated higher. ReViiV averages 4.5 out of 5 from 8 ratings, while TachyMon averages 3.8 from 288 ratings.

### Do ReViiV or TachyMon have ads?

Neither ReViiV nor TachyMon shows ads.

### Which is updated more often, ReViiV or TachyMon?

ReViiV ships an update monthly, and TachyMon every 3 months. Most recently, ReViiV was updated on November 3, 2026 and TachyMon on November 3, 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.*