The app works very well the vast majority of the time and has saved me a ton of time. That being said, when you input a very long formula (such as adding 20+ objects) the apps handwriting recognition (specifically recognition of "1") degrades significantly and the app crashes regularly. Regardless, as this is a fairly odd situation which I imagine is taking a lot of resources, Im comfortable recommending this app to anyone as the bulk of the time it performs flawlessly.
WunderBliss about MyScript Calculator - Handwriting calculator, v1.3.2