I have been using this app for approx 10 months and it helps calm the nerves, especially for a first time parent, as you can check whether the difficult phase is due to a developmental change or if something else may be bothering the baby. The new version of the app has received a design overhaul which was overdue. It is now easier to navigate, and looks way better. Nevertheless, a few points could be improved: the colours could be stronger, and the legend should be on the same page as the schedule. The translation needs to be reviewed, I am using the German version and have encountered a number of words in the texts that were not translated (especially "him"). Also, some sentences simply don't make sense (e.g. on the intro pages to the new version). Still, the app is great and I wouldn't want to miss it.
Not much information The app doesn't contain much tips or information, just the basic content about the milestones of development. No daily or weekly updates.
Ich finde das Buch gut, daher habe ich für App gekauft. Alleine die Funktion der App, jeweils die relevanten Informationen und die Position des Babies innerhalb der Phasen anzuzeigen, rechtfertigt meiner Meinung nach die Investition.