Petra - Unsupported - Personal trainer!
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This version is no longer supported, use instead! Petra will tell you what to do with your workouts!

This version is no longer supported, use instead! ----- Google will stop support this type of apps. :( Petra will therefore move to the web instead! From there you will be able to install Petra on your computer and access it offline just like normal. It will also work perfectly on your smartphone, offline and installable right from the webpage! What does this mean? You will still be able to use this app on this computer. But sometime around the summer you will no longer be able to install Petra on new computers. Nor will you get updates to this version. So we highly recommend you to go to the url at the top and get the latest version! Happy training! / Slim Sim ---------------------------- This app will coach you through good workouts! Simply start a workout, turn up the volume and Petra will tell you what exercise to do and for how long via the speakers. Petra has a built in timer and comes with a few pre-programmed workouts, including the popular "7 Minute Workout", a core workout and a leg workout. More workouts will be added as time goes by. You can also create your own workouts with your own exercises, simply give your workout a name and write a comma or dot separated list of exercises at the bottom and your good to go! Get Petra for Android here: Now Petra will also tell you the half time, allowing you to switch from one side to another if you need. Petra has three types of workouts, double workout, single workout and stretching. The double workout is the longest and most intense program: 1 First exercise for 45 seconds 2 Second exercise for 45 seconds 3 The first exercise again for 30 seconds 4 The second exercise again for 30 seconds 5 Then a pause for 15 seconds Then the next set starts with the third and fourth exercises... The single workout is slightly shorter: 1 First exercise for 30 seconds 2 Pause for 10 seconds Then the next exercise... The stretching program is the fastest. 1 First stretching exercise for 20 seconds Then the next stretch exercise without any pause. So: download this app and let Petra take control over your fitness! ------------- Any suggestions on improvements can be mailed to, or submitted at the Chrome App Store. Petra is open source; you are welcome to make any changes to the program. If you want the source code, please email and you will receive a copy.

4.5 out of 522 ratings

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Galaxy SilsbeeAug 30, 2017

This is a good way to time and pace your workouts, but is best if you alter or customize.

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Nisarg HarneNov 25, 2015

not many exercise options. interface is not very nice. i would like it if you had categorized all work outs.

4 out of 5 people found this helpful
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Norma DuffortNov 2, 2015


4 out of 4 people found this helpful


  • Version
  • Updated
    March 11, 2020
  • Offered by
    Slim Sim
  • Size
  • Languages
  • Developer
    Ternsjö IT AB
    Salabacksgatan 8B Uppsala 75432 SE
  • Trader
    This developer has identified itself as a trader per the definition from the European Union.


The developer has not provided any information about the collection or usage of your data.


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