Education Series app development(Flutter or React-native)

Description

I gonna to build 70 apps of the volume of the follow app.
https://apps.apple.com/jp/app/はじめてのタッチ/id979525514
https://apps.apple.com/jp/app/けいたい君のひみつポケット/id1569756075
...
even 70 app, it's simple, each app's content is very simple and similar each other, in a word, it's educational series app.so first one you will make first, will be basis to all of the other ones, and then, you can imitate, copy/paste.
>>needed function :
Social Media IntegrationWeb ViewBanner ad insertionPush notificationsIncludes ad implementation.Advertisement ID also implemented
The platforms are Android and iOS.
The individual apps are based on each other, so they can be useful and implemented as other apps.This is about the work content, but since one app is the basis, it can be useful and implemented in other apps.Titles can be useful with same thing.There are some changes to the menu screen.The main part changes, but, there are basically no complicated elements in the main part.Every app's UI and functions are same almost.So that most of the cost of the project would be spent on creating the first app, and the rest would be a series, so it would be an iterative task to imitate and copy the first app.Because it is an educational series, I gonna to proceed with a gradual completion process within two months.wireframes, materials, and designs for each app can be delivered every time!
one by one.Upon delivery, the entire project, source codeRequired store registration for both Android and iOS.
there is no final delivery date, and 1 app is considered to be 2 days.The first one becomes a template, so it takes about 4 days.
Thank you.