Blog

#ios

Engineering notes, product decisions and lessons from running our own apps. One or two posts a month, no marketing.

Privacy & Security10 Oct 20263 min read

App Store privacy labels explained: what "Data Not Linked to You" really means

Data used to track you, linked to you, not linked to you, not collected: what the App Store labels and Google Play Data safety actually say — and how our own apps compare.

Developer Tools2 min read

Colors in Xcode: dark mode, high contrast and generated symbols

Name colors by role, keep dark and high-contrast variants in one color set, use the symbols Xcode generates and check contrast with numbers — plus the grey that failed our own accessibility tests.

Product2 min read

Blocked in Russia or blocking Russia? How Block Checker tells the difference

Engineering3 min read

VLESS, Xray, sing-box and Hysteria 2: what powers modern VPN apps

Privacy & Security10 Oct 20262 min read

Calls without a phone number: how ID Caller keeps conversations private

No number, no email, no account: a 12-digit ID, keys generated on your device, contacts only by mutual consent and encrypted peer-to-peer calls. Here is how ID Caller works.

Developer Tools10 Oct 20263 min read

App icons in 2026: what Xcode still needs for iPhone, Mac and Apple Watch

One 1024-pixel image for iPhone, a full set for Mac, dark, tinted and clear looks, and Icon Composer: a practical guide to Apple app icons in 2026.

Get new posts by email

One email per post. No digests, no promos.