What stack of technologies (languages, framework, database) would you recommend for creating a web application and an application for a phone/tablet (Android, IOS)?

Question

Mobile development

Good afternoon Ladies and Gentlemen,
I want to create (for myself) a cross-platform application in order to improve and gain new skills. It is important for me that it works both in the browser and on the phone / tablet (preferably both IOS and Android). The application is a panel with tasks, a calendar, various lists of everything but nothing more. It is important for me that when creating a new task in the browser, this is displayed accordingly in the application on the phone. Real time so to speak.
I thought about Cordova, Ionic3, but after testing a couple of blanks, I realized that I didn’t like the delay after pressing buttons, brakes, slow updating of large tables.
It seems to me that I need to look towards React Native or Vue.js, but I'm not sure.
I know javascript, php, html/pug/css/sass/ and basic java.
Or maybe make a panel on js / php / html and then connect the database through the conversion to json with a native android application? Of course, the phone would then have excellent performance, but then Ios really falls out as a platform and I don’t understand Swift at all.
My application is very simple in terms of functions (create a task, delete, edit, a couple of tables here and there, and that's all). But I want fast performance on phones.
What technology stack would you choose to solve such a problem? And how would you solve the problem with databases?
I would appreciate your opinion
Regards
Daniels

Answer 1

Dart without options.
React Native and other JS crafts are walking corpses - crooked, uncomfortable, slow.

Answer 2

Dart/Flutter
Dart: convenient and expressive language, subjectively simpler than JS.
Flutter: A Google-backed cross-platform framework with a very high code reuse rate.