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34 quick stories on the rack · #ios
4 min

Push Notifications Still Reach Killed Apps

One always-on OS daemon handles every notification, so killing an app changes nothing. The full delivery chain…

LPLeo Park↗
5 min

Why Your Phone Ignores Your DNS Settings

You set a custom DNS server and your phone routes traffic through your carrier anyway. The mechanism is specif…

SISana Iqbal↗
5 min

Why Two Phones Get the Same Notification at Different Times

Same server blast, different arrival times. Five real reasons your phone lags behind, and what to do if it kee…

SISana Iqbal↗
5 min

Why Your Phone Throttles Downloads With the Screen Off

Your phone deliberately slows background downloads the moment the screen locks. What's actually happening, whi…

LPLeo Park↗
4 min

How Phone Processors Decide Which App Gets Priority

Your phone's chip makes thousands of scheduling calls per second. Understanding those decisions explains why a…

LPLeo Park↗
5 min

How Your Phone Ranks Two Notifications at Once

Two alerts hit your phone in the same millisecond. The priority system deciding which one surfaces first is mo…

SISana Iqbal↗
7 min

How Phones Choose Which Background Apps to Kill

Your phone kills background apps through a ranked priority system, not at random. The mechanism, and why your …

SISana Iqbal↗
5 min

How Your Phone Handles Multiple Location Requests

Your phone runs a quiet arbitration system when apps compete for location data. The logic behind it shapes you…

LPLeo Park↗
6 min

How Smartphone Processors Schedule App Tasks

Your phone's chip juggles hundreds of threads in microseconds. The actual mechanism deciding what runs next ex…

LPLeo Park↗
7 min

App Clip Permission Requests: The Exact Mechanism

App Clips request permissions before you install a thing. The entitlements file, not runtime code, decides whi…

LPLeo Park↗
5 min

Why Your Phone Quietly Demotes Apps You Ignore

Your phone ranks every app by how often you use it, then throttles the stragglers. The mechanism explains your…

SISana Iqbal↗
4 min

Why App Updates Keep Wiping Accessibility Settings

A structural flaw in how mobile apps store config data means accessibility settings vanish on updates. What ca…

LPLeo Park↗