Not really recommended
So, from the page in the App Store we can tell that there is four things listed as features which you have to pay for, three of them noted at the very bottom of the description as purchasable perks and one of them listed at the In-App-Payment tab as Ads. I downloaded the app, the table shown at the very end of the setup process disclaims that 10/10 available perks besides coding, the core function of the app, have to be paid for. It‘s worth to be noted however that the developer(s) actually didn‘t say otherwise by writing [..] certain features LIKE […], which doesn‘t exclude every other feature. Conclusion: low part of what was assumed to be free actually free plus having to watch ads…