This book centralises the science of designing interfaces, void of any specific platform or device but rather allows the reader to think spatially in terms of UX for the thumb. The Mobile developer will be able to follow the various topics or 'best practices' in a familiar theme of Problem-> Solution, with commentary and options following that. Some of the topics are quite basic, stale and non-exciting but if you can follow the book and skip over sections you don't feel is appropriate for you, then this book accumulatively is great.

I recommend this book, because it forces developers and designers to go through the basics they thought was right, re-think that and adjust, rather than cut corners and dive into the excitement of mobile development. I would take my time and read each chapter on my down time and learn something new, rather than dedicate a whole chunk of my time in one go to it. It's the type of book that is a reference than a page-to-page necessity. If you are working on an iOS, Android or Mobile Web App, this book provides themes that are device-independent in a thoughtful, comprehensive and mechanical approach. 

Designing Mobile Interfaces

 

TypeTool which can be found by clicking here is a locally brewed app, designed Vodafone's AppLand, and is a great tool for iOS developers to have handy in their 'pockets' when designing pixel-perfect text for their applications. As a version 1.0, it does quite a good job. 

Basically you play around with the various text combinations, look at how it looks like on your Retina or older device, and see how it renders. You then go to Photoshop and use the settings you had for the right combination you set on your phone and there you go, you have the correct settings. It aims to take the guessing away from getting the right text.