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Battery Guesstimate


1. Shows the battery charge over time (including Solar charge if available)</p><p>2. Estimates how long the battery would last (better than the build-in estimation)</p><p>3. Notifies the phone when a set threshold is reached during charging (to extend the battery lifetime)</p><p>4. Export battery data to cloud-storage:</p><p></p><p>If you want to help me to further improve this app you have multiple options:</p>

What’s New

1.12.4</p><p>- added more devices</p><p></p><p>1.12.3</p><p>- bugfix: on Forerunner 955 the app would only show a black screen on start</p><p></p><p>1.12.2</p><p>- bugfix: when reading timeframe for glance view</p><p>- support for Marq2 watches</p><p>- code cleanup</p><p></p><p>1.12.1</p><p>- bugfix: app could have crashed in the case the "Battery Charge Threshold" had an invalid setting</p><p></p>

Additional Information


This app requires access to:

  • Run in the background when it is not active (potentially affecting battery life)
  • Send/receive information to/from the Internet
  • Descent™ G1 Descent™ G1, Descent™ G1 Solar, Descent™ G1 Solar - Ocean Edition
  • Enduro™ Enduro™
  • Enduro™ 2 Enduro™ 2
  • Forerunner® 955 Forerunner® 955, Forerunner® 955 Solar
  • 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 Ballistics
  • fēnix® 7 fēnix® 7, fēnix® 7– Sapphire Solar Edition, fēnix® 7 Solar, quatix® 7
  • fēnix® 7 Pro fēnix® 7 Pro, fēnix® 7 Pro – Solar Edition, fēnix® 7 Pro – Sapphire Solar Edition
  • fēnix® 7S fēnix® 7S, fēnix® 7S– Solar Edition, fēnix® 7S– Sapphire Solar Edition
  • fēnix® 7S Pro fēnix® 7S Pro, fēnix® 7S Pro– Sapphire Solar Edition
  • fēnix® 7X fēnix® 7X, fēnix® 7X - Solar Edition, fēnix® 7X– Sapphire Solar Edition, quatix® 7X – Solar Edition
  • Instinct® 2 Instinct® 2, Instinct® 2 - Camo Edition, Instinct® 2 Solar - Tactical Edition, Instinct® 2 Solar - Surf Edition, Instinct® 2 - dēzl™ Edition
  • Instinct® 2S Instinct® 2S, Instinct® 2S - Camo Edition, Instinct® 2S Solar - Tactical Edition, Instinct® 2S Solar - Surf Edition, Instinct® 2S - dēzl™ Edition
  • Instinct® 2X Instinct® 2X
  • Instinct® Crossover Instinct® Crossover
  • MARQ® (Gen 2) MARQ® (Gen 2), MARQ® Carbon Collection
  • MARQ® Commander (Gen 2) – Carbon Edition MARQ® Commander (Gen 2) – Carbon Edition
  • MARQ™ Aviator (Gen 2) MARQ™ Aviator (Gen 2)
  • quatix® 6 quatix® 6
  • quatix® 6X quatix® 6X, quatix® 6X Solar, quatix® 6X Dual Power
  • tactix® 7 tactix® 7, tactix® 7 – Pro Ballistics Edition, tactix® 7 – Pro Edition
Average Rating: (35 Ratings)

Rick Sanchez
November 12, 2023 | Version 1.12.4


Alexander Schäfer
November 10, 2023 | Version 1.12.4

Super app. Work perfekt

Simon Lalonde
September 5, 2023 | Version 1.12.3

Work really good Message to the developer: Do you know a way to setup battery threshold for an iphone. (you just mentioned it for android) I also need to understand how to use the server data export feature Thanks

Developer Reply
September 5, 2023, individual-it

I never own an iPhone, so I cannot tell you for sure. But I expect that you only need to set the threshold in the app settings through Garmin Connect on the iPhone, same as on Android. Then when the threshold is reached you should get a notification saying that Garmin wants to open the webpage 'http://battery-level-reached.garmin'. That is how you would know the threshold is reached. I sadly don't know of any magic to make it nicer, like we can do on Android using Tasker

July 15, 2023 | Version 1.12.3

Nice app for battery monitoring. It would be a great feature to add a chart for more than 14 days for Instinct 2

Developer Reply
July 15, 2023, individual-it

Thank you for your review. In theory it would be possible to remember & display more than 14days, but that would result in longer execution time in the background task every 15min. The reason for that is that the storage is pretty full with the current way of storing data (one float per slot). More data can be stored if every slot would take an array of values, but then to save a new reading the background task would have to read the old array, process it and rewrite the complete value.

July 13, 2023 | Version 1.12.3

Works perfect with I2X ST

June 19, 2023 | Version 1.12.3

Great tool. Allowed me to debug a faulty battery and get a replacement watch.

May 26, 2023 | Version 1.12.3

Great battery monitoring app. Forerunner 955 solar, Instinct 2 solar. Although it does not have color graphs, you will find out how much the battery was discharged during the activity and how much the solar charged.

May 17, 2023 | Version 1.12.2

Nice data for battery status,but unfortunately the notification for charging threshold doesn't work at all.My device is FR955 with IOS.

Developer Reply
May 17, 2023, individual-it

Others seem also to have the issue, but I cannot reproduce it. Please contact me through the "Contact Developer" link, so that we can try to debug it together

May 11, 2023 | Version 1.12.2

Merci de la prévoir en français sinon super !

Developer Reply
May 11, 2023, individual-it

Sorry I do not speak French :-( But if you are interested to help, please contact me through the "Contact Developer" link.

March 26, 2023 | Version 1.12.2

For some reason it doesnt send battery threshold notification to phone anymore. Other IQ app with same functionality works okay.

Developer Reply
March 29, 2023, individual-it

I could not reproduce the issue, neither in the simulator nor on my real device (Instinct 2 Solar). Please contact me via "Contact Developer", so that we can look into it together

Abhiram R
March 5, 2023 | Version 1.12.0

Nice app. Does what it is supposed to, well. One suggestion: maybe redesign the battery and question mark symbol.. make it look prettier.. just a thought... and thanks for the app!

Developer Reply
March 5, 2023, individual-it

Thank you for the nice review. I'm horrible at designing, so I'm happy to receive suggestions for the symbols

Senthil Kumar
February 15, 2023 | Version 1.12.0

I was using the app for past three months. Appreciated your effort. And thanks for the new export feature. I have an suggestion on export feature. As I have no idea how to export data to webdav. If there is an option like save as to txt, xls or csv. will more helpful for general users.

Developer Reply
February 16, 2023, individual-it

Hi Senthil, thank you for your review. Yes, I totally understand that the export option is not ideal, but sadly Garmin is limiting on what can be send out of the watch. 1. there is no way to send/save data as txt, xls or csv 2. there is no way to store data directly to the phone 3. the only way is to send data to the internet and it has to be JSON formatted So, I need a service available on the internet, to receive the export. This could be a public service like pastebin, but then the export would be publicly available. Or I could run an own service (that potentially would overcome all the shortcomings 1-3), but as this is a free app I cannot sustain to run and maintain extra infrastructure. So I decided to make it possible for users that have their own cloud-storage to export it there. I'm happy to discuss other options where to send data to. If anyone has ideas please open an issue in

Hiệp Nguyễn
February 12, 2023 | Version 1.11.0

Great app. Love how it works. I wish the loading for graph is quicker.

Developer Reply
February 12, 2023, individual-it

Thank you for the nice review! Just to give a bit of background: The reason for the slow graph loading is the fact that the app has to read quite a bit of data from permanent storage. There is some caching involved, e.g. you would have notices that when you switch from a shorter graph to a longer one, the first bit is loading faster than the rest and if you switch back the graph comes up very quickly. A different data structure would speed up the loading, but would have a negative impact on the battery consumption. I wrote some details here: Feel free to add your opinion in the issue.

Nick Iodice
January 23, 2023 | Version 1.11.0

Seems nice so far. Let’s you choose what duration you want to see battery life calculated for, which is nice because it’s super clear how the expected life is computed. Still testing out but so far it seems really nice!

October 18, 2022 | Version 1.10.1

How do I import that battery threshold profile/task .PRF.XML file to Tasker? Very nice feature just need to get it working. :P

Developer Reply
October 18, 2022, individual-it

I had to look for it for a long time also. You have to tap on the Android symbol in tasker in the bottom left corner and then there will be a menu with an import option. Contact me if you want o have a screenshot

Móni Péter
October 11, 2022 | Version 1.10.1

Usefull app, and nice to have the notification at desired battery level at charging.

Michał Derdzikowski
September 17, 2022 | Version 1.9.0


August 26, 2022 | Version 1.9.0

Love the latest update for option to change glances time period. Instinct 2 consumption is so small that 15 min is a bit too short period to measure. Using 30 and 60 min now. Thanks.

August 19, 2022 | Version 1.8.0

Nice app. But I have in 15 min still zeroes on instinct 2 solar? It is ok?

Developer Reply
August 21, 2022, individual-it

Yes, if the battery status did not change within 15 min (what is very possible on an instict 2 solar, depending on how you use it) the widget will only show zeros. I'm currently working on a version where you can set the timeframe for the glance view to whatever you want. see

August 17, 2022 | Version 1.8.0

Fantastic !

Виталий Челак
August 12, 2022 | Version 1.7.0

Хороший виджет

Tea Racer
August 8, 2022 | Version 1.7.0

It is great apps for battery!

Vasilis Machairas
August 7, 2022 | Version 1.7.0

Awesome, fast, accurate and practical! Thank you!

Vasilis Machairas
July 29, 2022 | Version 1.5.0

Since the loading of the graph takes too long, at least in Instinct 2, it would be more practical if the first page of the widget showed the 15, 30 , 45,60 min. Thank you

Developer Reply
July 29, 2022, individual-it

Thank you for the idea, I've created an issue to work on it, feel free to discuss details there

Vasilis Machairas
July 21, 2022 | Version 1.4.0

Awesome and very useful widget! It would be very useful if the user could adjust the interval of the log. In case by adjusting for example the interval at 1hour instead of 15m, could save battery.

Developer Reply
July 22, 2022, individual-it

thank you for your review and also the idea. I've opened an issue to remind me But I would not expect much battery saving, because the work that is done every 15min is very minimal. Still that would allow to store longer data periods