# HRV + > Heart Rate Variability (HRV) monitor for health and stress assessment. (iPhone/iPad app by ZUZ LLC.) - Source: https://appshunter.io/ios/app/hrv-plus/id711463963 (this page in markdown: same URL + `.md`) - Developer: [ZUZ LLC](https://appshunter.io/developer/711463966) - Category: Health & Fitness, Sports - Price: Free - Rating: 3.40/5 from 13 App Store ratings · 20 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 28 MB - Languages: American English - Released: 2013-10-23 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/hrv-plus/id711463963/reviews.md ## What is HRV +? Requires a Polar H6/H7/H10 HRM monitor, although it may work with other BLE Bluetooth HRM monitors. Heart Rate Variability (HRV) is a great indicator of what is going on inside your body. It's a measurement of how well the mind can slow heart rate (HR), which is an indicator of overall health and stress. In general, better health is indicated using HRV when there is more variability from an in-breath (HR speeding up) to an out-breath (HR slowing down). A simple one-minute measurement each day can be enough to predict when it is time to take it easy, to avoid sickness or injury. This application has some nice features like export RAW RR files for Kubios testing as well as unlimited time testing if you would like to perform other types of HRV tests. Additionally, you can export all data including RR files to DropBox. ## Key features - Heart Rate Variability measurement - Indicator of body's stress levels - Predicts need for rest - RAW RR file export for Kubios - Unlimited time testing - Dropbox data export ## Recent user reviews (10 of 20) All indexed reviews: https://appshunter.io/ios/app/hrv-plus/id711463963/reviews.md ### 5/5 — Brilliantly simple *2021-09-20* I’ve been searching for an HRV app like this for a long time with no success. This is exactly what I was looking for. All I wanted to do was to use my Polar H10 heart rate strap to measure my HRV and HR while I am sleeping. I don’t want any pep talks or recovery scores or anything like that, just the data — average HR, average HRV, average RMSSD. This is perfect! Thank you so much to the developer for creating this app. I’m not able to contact the developer here but my question is, I assume the HRV metric shown above RMSSD is SDNN? ### 3/5 — Raw RR interval export *2020-10-30, version 2.9.2* This is the only app I have found that can export the RR interval data and can be imported to Kubios. I also like that I can run it for any length of time, but would be nice to set another time other than a minute. ### 1/5 — It doesn’t work *2020-05-09* I downloaded this app a while back and never worked ### 1/5 — iPhones don’t support email of results? *2020-02-13, version 2.9.2* Very confusing. Can’t get detailed results emailed and can’t change length of time of analysis. Kind of useless. Disappointed ☹️ ### 1/5 — Doesn’t support the apple watch *2020-02-02, version 2.9.2* What a disappointment. ### 3/5 — Basic *2018-12-18, version 2.3* Works well, as a first HRV it’s ideal however it’s very basic, ideal for everyday use, not ideal for sports performance analysis. That said it does what it says on the tin. ### 2/5 — Poor functionality *2015-12-13, version 1.4.6* Looks nice but many problems. Has real issues connecting to hrm no matter what order I try to set it. If you try to access the control centre the menu buttons at the bottom distort and the panel won't come up. Needs many bug fixes so not worth the time to download ### 1/5 — Cannot connect my Polar H7 *2015-07-06* I cannot connect my Polar H7 using iPhone 6 / iOS 8.4. This is my first attempt, so I don’t know if it worked on older iOS. I *can* connect my H7 to other apps, so it appears to be an issue with HRV+. I hope the issue is resolved, as I would like to try this app. ### 1/5 — Doesn’t Work With Polar HRMs *2015-05-22* I have a Polar H7, which all my other heart rate apps seem to have no trouble with. This app can’t see it for some weird reason. The “info” says to “wet the sensors”. Well, I’m not rolling out of the rack to drop a bunch of cold water all over my chest, thanks. It’s a shame, the GUI is awesome but the product just doesn’t work. ### 5/5 — Simple and easy to use *2015-01-25* HRV+ Connected on the first try with my Jarv BT monitor. Get your music or podcast app running first, then start HRV and you can listen while you work out and monitor your heart rate. A nice enhancement would be to plot an exercise session by the second. ## Frequently asked questions about HRV + ### What devices are compatible with HRV +? HRV + requires a Polar H6/H7/H10 HRM monitor, but may also work with other BLE Bluetooth HRM monitors. It is supported on iPhone and iPod devices. ### How accurate is HRV +? The app's accuracy is reflected in its user rating of 3.4 stars from 13 ratings. Users can export RAW RR files for further analysis with tools like Kubios. ### Does HRV + have ads? No, HRV + is ad-free and does not contain advertisements. ### What is the age rating for HRV +? HRV + has an age rating of 4+, making it suitable for a wide range of users. ### How often is HRV + updated? The latest version of HRV + is 2.9.2, which was last updated on April 29, 2019. Future updates may be released by the developer, ZUZ LLC. ### Can I use HRV + without a specific heart rate monitor? HRV + specifically requires a Polar H6/H7/H10 HRM monitor or another compatible BLE Bluetooth HRM monitor to function. ### What kind of data can I export from HRV +? You can export RAW RR files for Kubios testing and all other data, including RR files, to Dropbox for further analysis and storage. ### Is HRV + free to use? Yes, HRV + is available for free download and use, with no in-app purchases or subscription fees. ## Version history (last 5 releases) ### 2.9.2 — 2019-04-29 We fixed a bug that had been created in 2.9.1 (the last version) that would not allow saving readings. We also temporarily removing user review popup until we can do more testing. ### 2.9 — 2019-04-24 -User Reviews ### 2.5.1 — 2019-01-16 Updated so Dropbox works again ### 2.3 — 2017-09-22 - Fixed exporting of old RR files - FIxed Month format for non-English users - Set Default record method to previously saved method ### 2.2.0 — 2017-07-01 Fix to make Polar H10 work --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*