On November 25 at 9:10 AM Moscow time, an update was released to the Tzlvt app for iOS under version 1.2. The release caused a bug that left users unable to use the app for 24 hours. The app opened on the phones, but showed a black screen and didn't respond to gestures or rebooting. On November 26 at 9:05 an update was prepared with a partial fix for the problem. At 19:47 it became available to users.

Tzlvt. “Black Screen of Death” Post-Mortem

I've wanted to rewrite Tzlvt for a long time. In this post, I show the process and the results of the app redesign.

Tzlvt. Why Rewrite in TypeScript

We added new currencies and a comma on the keyboard for entering cents.

Tzlvt Update!

Over the course of my work on Tzlvt, I've learned that it's still difficult for web applications to replace native ones. In this post, I'll discuss the advantages and disadvantages of web apps.

Tzlvt. Native vs Web

A week ago, I started helping with the development of a finance management app. This is my third app on React, and I'll be sharing my experiences, ideas, and process with you. The first post is about design principles.

Tzlvt. How Design Principles Affect Development

Mobile app that helps you save money. Works on all popular platforms.

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