I have written an iOS app. It is very simple, solving a simple problem I encountered when travelling for work, changing hotels multiple times during a single business trip. When staying in a hotel with a keycard, I prefer not to carry the cardboard slip around with me. I get

Introduction How to tweak your iPhone so that the Silent/Ring switch becomes the Orientation Lock Toggle. There are a few tweaks possible on iOS that do NOT REQUIRE JAILBREAK. Here are the three that I find useful. Numeric Cellular signal strength * Relatively easy to achieve, laptop/iTunes not required