Tock

Instantly build and test Standards-based time formats with Tock. • Need to match a Web services date and time pattern? Enter your sample dates and tweak your formats and exclusions to fit. • Generate Objective-C and Swift code from your working patterns • As you edit, Tock instantly renders the current time, letting you inspect your results as you build them. • Built in Standards quick reference App is priced at "Buy your coder a coffee". If you cannot afford this, contact the developer directly.