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performanceX is a data field that collects several metrics, you can select 3 of them to be shown during your training.</p><p>NOTE: Due to the nature of MOST of these metrics, the results are most reliable during aerobic pace! Some might not be suited for HIIT!</p><p></p><p>This app is a standalone product and not related to anything else with the same name!</p><p></p><p>Some metrics need some time until the results are reliable. The field shows "Wait" in that case.</p>

What’s New

Version 1.0.1: New device supported (ENDURO)</p><p>Version 1.1.0: New behavior of "HRRS Deviation". Base value gets calculated between minute 6 and 30. Note that on reset or first use this value is always 0.

Additional Information


This app requires access to:

  • Send/receive data via ANT radio to/from third-party sensors
  • Record additional information into activity files
  • Your Garmin Connect™ fitness profile
  • Approach® S62 Approach® S62
  • Captain Marvel Captain Marvel
  • D2™ Air D2™ Air
  • D2™ Charlie D2™ Charlie
  • D2™ Delta D2™ Delta
  • D2™ Delta PX D2™ Delta PX
  • D2™ Delta S D2™ Delta S
  • Darth Vader™ Darth Vader™
  • Descent™ MK2 Descent™ MK2, Descent™MK2i
  • Descent™ Mk2S Descent™ Mk2S
  • Enduro™ Enduro™
  • First Avenger First Avenger
  • Forerunner® 245 Forerunner® 245
  • Forerunner® 245 Music Forerunner® 245 Music
  • Forerunner® 645 Forerunner® 645
  • Forerunner® 645 Music Forerunner® 645 Music
  • Forerunner® 745 Forerunner® 745
  • Forerunner® 935 Forerunner® 935
  • Forerunner® 945 Forerunner® 945
  • fēnix® 5 fēnix® 5, quatix® 5
  • fēnix® 5 Plus fēnix® 5 Plus
  • fēnix® 5S fēnix® 5S
  • fēnix® 5S Plus fēnix® 5S Plus
  • fēnix® 5X fēnix® 5X, tactix® Charlie
  • fēnix® 5X Plus fēnix® 5X Plus
  • fēnix® 6 fēnix® 6
  • fēnix® 6 Dual Power fēnix® 6 Dual Power
  • fēnix® 6 Pro fēnix® 6 Pro, fēnix® 6 Sapphire
  • fēnix® 6 Pro Dual Power fēnix® 6 Pro Dual Power
  • fēnix® 6 Pro Solar fēnix® 6 Pro Solar
  • fēnix® 6 Solar fēnix® 6 Solar
  • fēnix® 6S fēnix® 6S
  • fēnix® 6S Dual Power fēnix® 6S Dual Power
  • fēnix® 6S Pro fēnix® 6S Pro, fēnix® 6S Sapphire
  • fēnix® 6S Pro Dual Power fēnix® 6S Pro Dual Power
  • fēnix® 6S Pro Solar fēnix® 6S Pro Solar
  • fēnix® 6S Solar fēnix® 6S Solar
  • fēnix® 6X Pro fēnix® 6X Pro, fēnix® 6X Sapphire, fēnix® 6X Pro Solar, tactix® Delta Sapphire, quatix® 6X Solar, tactix® Delta Solar, tactix® Delta Solar Ballisitcs
  • fēnix® Chronos fēnix® Chronos
  • MARQ™ Adventurer MARQ™ Adventurer
  • MARQ™ Athlete MARQ™ Athlete
  • MARQ™ Aviator MARQ™ Aviator
  • MARQ™ Captain MARQ™ Captain, MARQ™ Captain: American Magic Edition
  • MARQ™ Commander MARQ™ Commander
  • MARQ™ Driver MARQ™ Driver
  • MARQ™ Expedition MARQ™ Expedition
  • MARQ™ Golfer MARQ™ Golfer
  • Mercedes-Benz Venu® Mercedes-Benz Venu®
  • quatix® 6 quatix® 6
  • quatix® 6X quatix® 6X, quatix® 6X Solar, quatix® 6X Dual Power
  • Rey™ Rey™
  • Venu® Venu®
  • Venu® 2 Venu® 2
  • Venu® 2S Venu® 2S
  • Venu® Sq. Venu® Sq.
  • Venu® Sq. Venu® Sq.
  • Venu® Sq. Music Venu® Sq. Music
  • vívoactive® 3 vívoactive® 3
  • vívoactive® 3 Mercedes-Benz® Collection vívoactive® 3 Mercedes-Benz® Collection
  • vívoactive® 3 Music vívoactive® 3 Music
  • vívoactive® 4 vívoactive® 4, GarminActive
  • vívoactive® 4S vívoactive® 4S, GarminActive S
Average Rating: (11 Ratings)

August 25, 2021 | Version Release 1.0.1

Great insights!

June 25, 2021 | Version Release 1.0.1

great app, thank you! it really helps me improve my performance.

Developer Reply
June 25, 2021, MartinH22

Thank you, I'm glad you like it!

March 5, 2021 | Version Release 1.0

I have been using the metrics of this data field for a few weeks now and can only say that they greatly enhance my training. Thank you for making my training more efficient and making me faster.

Developer Reply
March 5, 2021, MartinH22

Thanks for your feedback, that's great to hear!

February 16, 2021 | Version Release 1.0

Good DataFiel, I have Fenix 6x, can you put all fiels on oye screen, from 3 to 6 etc.

Developer Reply
February 16, 2021, MartinH22

Thanks for your feedback! I'll check if there is a way to show more fields, i can't promise, but it might be part of a future release.

Adam Rykala
February 13, 2021 | Version Release 1.0

Provides some interesting food for thought data. Going to keep using this for a few months whilst I build up my VO2 Max again and see how it correlates with how I feel. Excellent datafield for nothing!

Developer Reply
February 13, 2021, MartinH22

Hi Adam, thank you very much for your feedback! To calculate the VO2Max, the datafield relies heavily on the HR you set in the options, so you should check from time to time if they're up to date. For best reliability you should compare VO2Max on similar terrain to track your progress (using grade adjustment helps but has its limitations). I hope the datafield supports you in your training!