lukwi

This is by far the best free photo editor on the iPhone and the iPad I know. When I saw that it got a major update I was a bit afraid that many good things would be lost. However, it was mainly a change of the user interface and the introduction of a few very good new features without getting rid of the original ones. You can now undo individual steps once they've been applied to the image (one of the major flaws in the previous version of the app). The very accurate selective adjustment options are still unparalleled by other apps. And last but not least it is very useful that the app works o

I've tested quite a few HRV applications and this one is by far the best. It lets you measure your HRV via camera or a chest strap - and there are detailed analyses on the accuracy of both methods on the accompanying blog. The app has a good annotations system that allows for several detailed reports once you've collected enough measurements, such impact of different training intensities on your HRV and you can run various correlations with other measurements. The good thing is that the developer constantly keeps the app evolving by adding new features. On top of that he's very knowledgea