Metric VBT - Changelog

Version 0.5.0 - Video Overlay and Rest Timer

June 25, 2022

What's New 🚨

Video data overlay and easy sharing Metric now has a visualisation of your data placed on your lift video. This can help you understand how each rep looks and relate it back to your velocity. With the addition of a share button its now even easier to post your lifts to social, or quickly send them to your coach.

Rest timer Keep honest about your rest times with a new timer on the menu bar. It starts counting as soon as your last rep ends so you don’t have to do a thing!

Video re-processing Some older devices could struggle to keep up with the Metric computer vision algorithm during live recording. Now Metric will automatically detect if your device dropped frames and quickly re-process videos to confirm everything is accurate!

Fixes 🐛

  • Weight field now allows comma’s to denote decimal place. Metric was not recognising European keyboard entry on the weight field. Region localisation is now turned on so Metric can be used no matter where you are!
  • Missing video thumbnails have been found. Metric would sometimes show an ugly placeholder where the video thumbnail should be. Now it will always show you getting ready to max out!
  • Kicking you out of the highlights screen shouldn’t be a thing. Metric was shooting people back from the screen with the bar charts before they could actually look at them. We couldn’t actually replicate this issue but Metric has been changed so that this is less likely to happen… (Let us know if you spot this bug?!)

Version 0.4.1 - App Store Launch

April 29, 2022

What's New 🚨

Metric VBT now publicly available on the App Store for iOS
We are thrilled to be able to launch the first public version of Metric VBT. Metric allows users to record a set of a barbell lift and immediately receive accurate velocity and range of motion analysis.

Find Metric VBT here.

User training data in the cloud
For now there is little change to the user experience compared to the last beta, but Metric now connects to a cloud storage database which will allow future performance tracking features to be built!

Improved ✨

  • Added 0% velocity loss support card. Sometimes Metric reports 0% velocity loss across a set, and that can be confusing! So now there is a support card explaining why this happens.
  • Changed highlight information for single rep sets. Similarly you can’t have fatigue or variance on singles, so the highlights cards now show no value for these.

Fixes 🐛

  • Tapability of cards. Some of Metric’s cards which looked tapable would not respond to taps if you didn’t tap the text or icon. Now the entire card can be tapped and Metric will respond as you expect (by opening the card!)

Version 0.4.0 - Public Beta

April 19, 2022

What's New 🚨

Account creation
Metric now requires users to create an account. In the future your user profile will allow Metric to track your velocity data over time and much more!

Error messages and information
Metic will now report when your data may be inaccurate due to errors in phone positioning. Messages point users to a guide for these common errors, helping you quickly make adjustments to your set up.

Improved ✨

  • Shortened introduction flow. We removed instructions about keeping the phone stationary from the onboarding because Metric now actually checks that your phone is stationary before recording, and warns you if it isn’t.

Fixes 🐛

  • Various text and UI colour changes. Do you ever notice spelling mistakes after hitting send on an email? App interface design is like that, and since launching the new UI we have spotted a lot of little things and got to work fixing them.
  • Various crash fixes. Metric was crashing and having issues with some phones on iOS14, and was being limited to 30FPS on some front facing cameras. Metric should now no longer have these issues.

Version 0.3.0 - Public Beta

March 17, 2022

What's New 🚨

New user interface design
Metric has been completely re-designed thanks to the feedback of our early testers. This new user interface features:

  • A persistent bottom menu lets you can start a new set with fewer taps
  • Refined Set Review screen following Apple design conventions
  • Highlighted stats which can be expanded
  • Graph and table design refinements for better clarity
  • The ability to review your set video from all the major screens
  • Consistent dark/light mode colour scheme

Improved ✨

  • Set data retained until a new set is recorded. Metric now holds onto your set data right up until you actually record your next set. Leaving the Set Review screen will not delete this data.
  • Unit type permanence. Previously if you selected pounds for your weights Metric would sometimes be stubborn and convert everything to... well, metric! Metric now accepts that metric is not the only metric.
  • Velocity trace auto-trim. The velocity trace now automatically trims to the first and last rep of a set, giving you a more focused view of how the set went minus all the pre-set fluffing around.
  • Ongoing improvement to algorithm precision. Metric more accurately tracks velocity and range of motion data than ever before.
  • Tweaked the acceleration triggers. You probably won’t notice but Metric is just a little faster at starting a set now!

Fixes 🐛

  • Removed Trap Bar Jumps and Squat Jumps. This is a temporary measure as Metric was throwing errant results for these explosive lifts. A future release will bring these back when Metric can confidently handle explosive lifts!
  • Various crash fixes. The endless hunt for the source of crashes on certain devices continues. Metric is now more efficient than ever, meaning many commonly reported crashes should be resolved.
  • Video rotation fix. Sometimes Metric would warp and stretch your video in unexpected ways. Now Metric should present videos as expected.
  • Camera preview dropout fix. Some users experienced a camera preview dropout while recording multiple sets in a row. We believe we found the culprit for this behaviour, and Metric should now correctly show you what Metric is seeing when recording.

Version 0.2.1 - Public Beta

February 28, 2022

Improved ✨

  • Enhancement to the velocity detection algorithm.
    The increase in fidelity with version 0.2.0 exposed a skew in Metric’s measurement of fast movements where bar speed exceeded ~0.8m/s mean velocity. This update removes this skew at faster velocity, further improving Metric’s validity and correlation to MOCAP reference data. Users may see notable change to their reported velocity for fast reps.

Fixes 🐛

  • Fixed a selection of annoying crashes.
    Metric pushes some older devices to the limit, often asking too much (of their memory and graphic processing). Metric is now less demanding, so older devices should no longer throw in the towel during sets!

Version 0.2.0 - Public Beta

February 22, 2022

Improved ✨

  • MAJOR UPGRADE to the velocity detection algorithm.
    Metric has been overhauled to enable high frame rate analysis at higher video resolution. This results in superior measurement fidelity and processing speed. Metric could previously process live video at 480p resolution at throttled frames per second. Significant re-writing of code now enables live video processing at HD 720p resolution and 60 frames per second. To say we are ecstatic about this update is an understatement!
  • Tweaking the movement triggers that end set recording.
    Metric should end the set recording when you pick up your device, but not when you bump it or drop weights. The device accelerometer monitoring has been tuned to better distinguish events and this should prevent set recording from ending early. We expect the trigger algorithm will need further refinement but this version should be a big step in the right direction!

Fixes 🐛

  • Fixed a selection of annoying crashes. Metric would spontaneously and dramatically stop in the middle of some users’ workouts. Now it should be more considerate and keep working for as long as you do.
  • Made the results table display more reps. Some users (who apparently enjoy pain and discomfort) would do sets of more than 17 reps. Metric previously couldn’t scroll that far on the results table, but now displays as many rows as required to pinpoint the exact moment you lost the will to go on.
  • Reduced media playback cut-outs. Your music or podcasts will cut-out at least 50% less often when starting sets. The other 50% is still unresolved but we continue to aim for perfection!

Version 0.1.4 - Public Beta

December 16, 2021

Improved ✨

  • Update to the ROM measurement algorithm. Metric uses a velocity threshold to determine the starting point of each rep when calculating ROM. This could result in overly short ROM for very slow reps. Now the algorithm waits for the velocity threshold, but travels back in time to where the bar first moved. As a result, the Metric ROM calculation is now more accurate without counting false reps.
  • Sticking-point recognition. When you hit a sticking point Metric would sometimes think you had actually reached the end of your rep. Now Metric believes in you, and will keep measuring the rep all the way to the top as you grind it out!
  • Refined the device movement trigger for ending recordings. Metric stops recording when you pick up your phone. Previously the movement trigger was a little too sensitive, and vibrations from dropping weights could end your set too early. Metric should now recognise the difference between vibrations and you actually picking up your phone.

Fixes 🐛

  • Fixed a bug that resulted in some users experiencing a crash while recording their sets. We were able to replicate the bug and Metric should now stay open and continue recording instead of just quietly giving up.
  • Tidied up pixels that were not quite up to par with a few UI tweaks (thanks Andrew!) so the interface is now in a better place.

Version 0.1.3 - Public Beta

December 10, 2021

Fixes 🐛

  • Fixed a bug where after selecting your weight Metric would correctly display the camera briefly, before incorrectly returning you back to the weight selection screen. This was due to a known problem with certain versions of iOS 14. Now instead of being refused entry to the future of VBT, Metric users on iOS 14 can actually experience it!
  • Changed the app settings so it is no longer available on iPad. Truthfully Metric wasn't built for iPad, so users who installed it found everything was a bit off. One day soon we will make a version for iPad... but that is not today!

Version 0.1.2 - Public Beta

December 7, 2021

What's New 🚨

Movement warnings prior to recording

Because the device must be stationary to correctly measure velocity, Metric now features warnings when the phone is moved or not in a vertical position. This prevents you from recording sets before the camera is correctly positioned.

Picking up the device ends recording

To make it faster to end a set simply pick up your phone. Metric will automatically stop the recording when it detects movement.

Removed video upload feature

Now that in-app recording is working great, we no longer need the ability to upload footage from the camera roll for testing. This simplifies using the app, and also stops users uploading videos that have movement or the wrong camera settings, both of which were resulting in sub-par data.

Improvements ✨

  • Velocity-time trace graph upgraded. Metric now shows a much better looking and more readable graph.
  • Minor changes to text sizing and colours.

Fixes 🐛

  • Fixed a text wrapping issue on some crucial pieces of information on several buttons and alerts. There's nothing worse than when a sentence just...
  • Certain progress indicators were not being displayed at the right time. They now show up where they should, letting you know that Metric is processing your video rather than frozen!

Version 0.1.1 - Internal Beta

December 1, 2021

What's New 🚨

Set Summary Page

After your set you will now be directed straight to a set summary highlighting key numbers from your set like best rep velocity, velocity loss and ROM variance

Bar charts

We now have a rep-by-rep bar chart in the Set Review screen which helps if you are the visual type! It is excellent for understanding how performance changed over the course of your set.

Onboarding tutorial

The key instructions for using Metric are now in an illustrated onboarding when you open the app for the first time, and also available from a Help button on the Home Screen.

Improvements ✨

  • Enhanced post-set workflow.
    When you have finished reviewing a set you can now save it and immediately start your next set with the press of a single button.

Fixes 🐛

  • Fixed landscape orientation killing the app. We have locked the app in Vertical orientation to prevent it becoming very not functional if you turned your phone on its side.
  • In certain cases racking and un-racking the bar was being mis-categorised as a rep. The rep detection model should now properly ignore racking and un-racking!

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