HF works by taking readings until they are relatively consistent over a 14 second period. Depending on various factors sometimes this can take 30 seconds or longer. Instead of scheduling these readings periodically continuous mode runs them right after each other, so in the best case you will get about 3 readings per minute.
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New version: heartfit1.3.2.apk - Google Drive
Option to display raw readings (more frequent) instead of filtered ones,
Continuous mode should be more robust.
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I have done some testing with new 1.3.2 version and Google Fit. Seems to work mostly well, a couple of times the overlay has not worked but starting manually again seems to fix it.
Hello dear,
I use HeartFit and sleep as Android on a lemfo lem15.
SaA is working on the watch the hole night but
HF seems to shut down by switching of the watch screen.
-I give all permission and allow to work in background.
Maybe : the watch have two working modes by an build in app calls optimations.
- Is normal
- Is performance
By normal, the watch battery is running for 1,5 days, but maybe shut down most app for battery savings.
By performance the watch battery is sucking an quarter of the day. But all apps are working.
For example
SaA is possible to work in background until normal mode.
HF maybe not.
Please, can you do something to let run HF in any modes in background?
Sincerely
Flo
It works on every Android 7 & 10 watch Iāve tried. Have you disabled both the battery cleaner (in the Optimization app) and battery optimization (in app settings)?
Hello dear,
sure I did, I tried everything possible in energy settings.
I wish I could tell the app to force in foreground so it can be active all the time.
But itās always shut down by black screen
OK. I have a LEM15 coming soon myself so Iāll be able to figure it out then.
Try this -
Optimization , clean task , battery saver , turn of desired app
Then -
Settings , apps and notifactions , special app access , unrestricted data access , turn on desired app
Then - Settings , apps and notifications , special app access , battery optimization , select " dont optimize " for the desired app
If this doesnt work i wiil eat my neighbours dog 
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I would eat this dog also 
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Hello dudes,
I mean I checked all this pointās. The main think is the working modes of the watch
1.normal, 2.performance like discibed. But in mode 2 the battery drains much to fast.
I canāt separate an app manually there. But some apps are working in background like Google Fit by an exercise.
When I start an exercise by fit firstly heartfit is starting also. But in the moment the screen goes of, heartrate stopping. Fit is running in background.
Energy features in battery settings and app settings are allowed in background for both apps.
And one think more : by Android sleep, heartfit doesnāt startingā¦
Iām hopeful waiting for if you are testing the lemfo lem 15.
If you have any question, please feel free to send me a PM
STOP, DONāT Eat, any DOG!
I figured out, a bad see able thing in optimation.
There is the Funktion I missed before!
I switched on all apps to closes in background. Now I allowed Heart Fit.
And now it do not shut of anymoreā¦
Only thing is heart rate shows doubleā¦150 while Iām sitting on sofa 
now I have to figure out this issueā¦
I will see next time if now all is fineā¦
Only allowed in settings - apps - using in background allowed - is not enough
Too late . I have eaten the dog
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Oh dear 
THX for support!
The heartrate counts normal now after restart the watch.
Now heartfit working fantastic!
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Great result . Trust your Doctor
Now I checked my rate. At bicycles the watch is measuring 56 bpmā¦ Thatās not normal, right? So Iām a quite Typ but not so quite
When I messured with stock app, itās same.
Is there any way to synconisize the watch sensor?
Getting good readings during workouts is a problem Iāve had with most watches Iāve tried. Only the LEM12/LEM12 Pro work well for me but apparently not for everyone. My LEM15 arrives today so Iāll see how that goes.
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Congratulation!
Iām happy about you have now the same oneā¦ 
private message sent please add me to the app
Hi, are you still accepting test users?