You should use new version of limit calculator:...
Ivan Petuhov is the official developer of the app which can be found in the Educational category. Old Of Limits Calculator has been downloaded and set up by over 100K users and the latest release is dated Oct 8, 2018. The overall score for the tool is 1.7 on Google Play.
Some in-app purchases and adverts are included into this application. Download the installation package of Old Of Limits Calculator 7.0.4 that is absolutely free of charge and take a look at users' reviews on Droid Informer. The app can be launched flawlessly on Android 4.0.3 and above. This download is totally secure.
As users indicate, you can notice such a drawback of the app as annoying ads.