In software systems design, we typically split requirements into two camps:

• Functional requirements - what a system should do ("display the current weather")
• Non-Functional requirements - how a system should perform ("data should be encrypted on transmit")

There is sometimes debate on what is Functional vs Non-Functional.... so I didn't bother categorizing my requirements. That being said, I want to be sure that my requirements were true requirements and not design decisions. For example, I need to be able to connect to the internet to get periodic weather updates, but that doesn't automatically mean that Wifi is a requirement.

Anyway, here's my initial list of requirements

Must Haves Functions

• Alarm
• Timer
• Calendar
• Habit Tracker
• Weather
• To Do List

Nice to Have Functions:

• Heath tracking
• To Do List
• Shopping List
• News

Stretch Goals

• Alexa integration
• Multi-user
• Music control

In addition, there were a few non functional requirements that I captured:

• Easily hackable
• Open Source
• Low Power (go 9-12 months between replacement or recharge of batteries)