His tafseer is not most authentic and you should not follow it. You may continue memorizing the Quran from it but avoid the tafseer.

There’s this application on iphone called “myQuran” and i find this app beneficial for memorizing Qur’an. I discovered that the tafseer on the app is by one “Maulana Mawdudi”. Should I stop using it?

Reading/Reciting the Quran | March 11, 2014 7:37 pm
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Is it right if I make the intention and complete the recitation of the Holy Quran once every month? Is there anything wrong in doing so? Will I be rewarded for the same?
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Reading the Quran without understanding it