You've completed the contest task. The app provides the options to create, edit and export static stickers. An advanced image editor is the unique advantage of this app, together with local cache support and options to edit published stickers. Additionally, the submission features multiple languages and a dedicated FAQ – however, it seems most of the strings are machine translated. The app also has a Play Store version: https://play.google.com/store/apps/details?id=stickermaker.telegramsticker.maketelegramsticker.tgsticker

An Auto-Remove Background feature would be the icing on the cake for this app. Conversely, the app currently displays an excessive amount of ads, interrupting the creation process and affecting the overall UX. 

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TOTAL: $1,500

In the language selection, the currently selected language displays as "Systemfehler" (german for "system error").
It would also be nice if the app didn't request permissions to read the entire storage, using an appropriate intent to let the user pick from the gallery seems like a better way.
But otherwise, the app looks very professional, well done!

Ads:
You put Ads in the App. Thats a No Go for me.

The export button to telegram leads to istickeri19_bot, you should have used the telegram Import API that is mentioned in the documentation. It would be nice if you hadn't add ads to it, it makes it difficult to test the app, besides that I like the app.

The application contains many ads, to participate in a contest where third parties will be engaged in testing it is annoying to have the ads.

Regarding the contest, it seems to me that the intention is to create apps using the platform for third-party applications that allow users to create stickers for Telegram, I have not been able to finish the import since the Telegram that I have installed does not detect me, but, I hope that the sticker pack created is in the name of the user and not the bot, in this way to be able to consult the statistics and more from @Stickers.