# Qalvin Legacy

> Calibrate and diagnose Quarq ANT+ power meters on iOS devices. (iPhone/iPad app by SRAM LLC.)

- Source: https://appshunter.io/ios/app/qalvin-legacy/id432171219 (this page in markdown: same URL + `.md`)
- Developer: [SRAM LLC](https://appshunter.io/developer/427232200)
- Category: Health & Fitness, Sports
- Price: Free
- Rating: 2.10/5 from 26 App Store ratings · 23 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 10 MB
- Languages: American English
- Released: 2011-06-01
- Data updated: 2026-08-17
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/qalvin-legacy/id432171219/reviews.md

## What is Qalvin Legacy?

Qalvin Legacy is an application for iPod Touch, iPhone and iPad that enables calibration and advanced diagnostics of Quarq ANT+power meters. Qalvin Legacy is not for use with BLE enabled power meters such as the Quarq DZero.

## Key features

- ANT+ power meter calibration
- Advanced diagnostics
- iOS device compatibility
- Quarq power meter support

## Recent user reviews (10 of 23)

All indexed reviews: https://appshunter.io/ios/app/qalvin-legacy/id432171219/reviews.md

### 5/5 — Works

*2023-06-14*

Mostly use it to test battery voltage.  Works fine for me, sometimes a phone reboot is needed to find the device.

### 4/5 — Worked to reinstall firmware

*2022-01-07*

My Quarq for Cannondale worked flawlessly until one day that it could not connect to my head unit (Wahoo Bolt). The Quarq Led would continuously blink. Qalvin Legacy does not communicate by iPhone to Quarq PM. I spoke with Quarq customer support and they said I must use either Windows or Mac PC with an Ant+ dongle.  So, I bought an Ant+ dongle from Amazon for $15. I downloaded Quarq Qalvin Legacy onto my laptop, but all fields other than “about” were greyed out. The Ant+ dongle would not change anything. My Laptop is Windows 10.  So, next I tried an old desktop that I keep in the house, but never use that still had Windows 8.  This time, when I inserted the Ant+ dongle into the USB, all of the greyed fields lit up! I entered the Quarq sensor number and selected install firmware and it installed successfully in about 1 minute. This worked flawlessly and my power meter is working perfect again.  This was my experience with Quarq Qalvin Legacy. It is old and required an older version of windows (or perhaps just needed to be a desktop instead of laptop?).  This worked.  I learned that it won’t work from an iPhone or an iPad, and in my case, even a newer laptop, but it worked perfect on an older desktop with Windows 8. Hope this helps someone who needs to reinstall firmware on a legacy Quarq, just like me.

### 1/5 — Does not work.

*2021-04-18*

It does not function, only opens the help link to the browser, and the target website is 404.

### 5/5 — It does work!!!

*2021-03-26*

This app works if you have an Ant+ dongle that plugs into your phone. I purchased a usb Ant+ dongle and used my Mac instead. You can download the MacOS version of this app at the Quarq Legacy help website. Cheap and easy and, most importantly, it still works as of March 2021.

### 1/5 — horrible app. Worthless

*2021-02-15*

It simply doesn’t work, and I can’t update my power meter firmware. Thanks for that Quarq!
I guess it’s time to consider another brand.

### 1/5 — Doesn’t work

*2021-01-25*

Downloaded app. Can’t search for a power meter or enter the I’d no. Years ago, I used the app to pair a quart Elsa rs. Now, nothing.

### 1/5 — Worthless

*2020-12-04*

Won’t work.

### 1/5 — The app don’t do nothing.

*2020-09-26*

It doesn’t work for nothing. Forums about the product are bad and there is no support for older Quarqs.

### 1/5 — Doesn’t work

*2020-06-11*

Can’t search for power meter. Nothing on the app works

### 1/5 — Can’t even use it

*2020-06-01*

Downloaded app, and the only thing I can click inside the app is the “Help” link, which redirects me to a webpage of Quarq that no longer exists. 
I deleted the old app for this one and I can’t even click “search for power meter.”

## Frequently asked questions about Qalvin Legacy

### What Quarq power meters does Qalvin Legacy support?

Qalvin Legacy supports calibration and advanced diagnostics for Quarq ANT+ power meters. It specifically states it is not for use with BLE enabled power meters like the Quarq DZero.

### What devices can I use Qalvin Legacy on?

Qalvin Legacy is available for iPod Touch, iPhone, and iPad devices.

### Is Qalvin Legacy free to use?

Yes, Qalvin Legacy is a free application, with no in-app purchases or ads.

### How often is Qalvin Legacy updated?

The latest version, 1.9, was released on May 16, 2017. The app has not been updated since then.

### What is the age rating for Qalvin Legacy?

Qalvin Legacy has an age rating of 4+, making it suitable for a wide range of users.

### What is the user sentiment for Qalvin Legacy?

The app has a rating of 2.1 stars from 25 ratings, suggesting a mixed to negative user sentiment.

### Can Qalvin Legacy be used with all power meters?

No, Qalvin Legacy is specifically designed for Quarq ANT+ power meters and is not compatible with BLE enabled power meters such as the Quarq DZero.

## Version history (last 5 releases)

### 1.9 — 2017-05-16

This app has been updated by Apple to display the Apple Watch app icon.

Updates for DZero power meters. Name changed to Qalvin Legacy.

### 1.6 — 2014-09-07

Updated Chainrings Selection behavior for XX1 power meters.

### 1.5.0 — 2014-07-22

Updated for the ANT Message Protocol Rev 5
Re-sends calibration request if not acknowledged
Added the option to view firmware release notes
Added the display of Power Balance in the Info screen
Settings screen: G.A.M mode renamed to to SRM PowerControl with
appropriate trademarking
Added Reset Defaults option to Settings screen
Updated calibration table chainring names to better reflect products
User chainring selections are now stored on the power meter when changed
with the calibration tables
Fixed a bug that prevented entry to the Diagnostics screen
Added low weight warnings to the calibration process
Added additional limits on all slope adjustments
Added dynamic reed and switch counts to the Diagnostics screen
Updated copyrights

### 1.4.1 — 2014-05-09

Resolved text display bug.

### 1.4.0 — 2013-12-13

* Added full support for iPhone5/iPodTouch5 devices using the lightning adapter.
* Fixed a crash in simulation mode
* Updated copyright

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## More apps by SRAM LLC

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All apps by SRAM LLC: https://appshunter.io/developer/427232200

## Related topics

[sram](https://appshunter.io/ios/topics/sram) · [sram red](https://appshunter.io/ios/topics/sram-red)

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*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 2026-08-17.*