When Can I Retire is a free iPhone app developed by Grow Nest Egg LLC. It falls under the category of Business & Productivity, specifically Finance. This app is designed to help users determine the age at which they can retire based on their financial circumstances.

The app offers a range of features to calculate your retirement age. It takes into account various inputs such as your current salary, yearly salary increase, yearly retirement contribution, yearly contribution increase, employer matching contribution, post-retirement expense, social security, and other retirement income.

One unique aspect of the app is that it considers the retirement age calculation for different types of retirement savings plans. For example, it factors in the penalty of 10% for early withdrawal from a 401(k) plan or 403(b) plan and IRA before the age of 59 ½. However, it notes that there is no penalty for early withdrawal from a 457(b) plan.

The app also takes into consideration the maximum contribution limits for employer-sponsored retirement plans and the catch-up contribution limits for individuals aged 50 and older.

In addition to providing a clear picture of your pre-retirement and post-retirement finances, the app allows you to email your plans in tabular and graphical views. It also saves your inputs for future reference.

When Can I Retire enables easy sharing of the app via email, Facebook, or Twitter directly from within the app.