I'm a college student who uses hour-tracking as a way to measure my time spent on side projects. Timely is the perfect app for this, but they just removed their free tier. I don't need any of the freelance / payment aspect of time tracking, but would love an app that allows me to track time spent on multiple projects.
- You can try Toggl. It's free and has a desktop and mobile app.I'm a huge Toggl fan, I use them exclusively for all my freelance work. Awesome chrome extension, reminders, projects, etc. great for freelancing.
- Take a look at these guys, they have a really awesome physical interaction tool to swap projects. Was a Kickstarter and they did really well.
- Daniel Alm made this productMy app Timing automatically tracks time you spend on your Mac. That's perfect for your purposes, as it lets you keep track of time without having to worry about start/stop timers, which can be particularly annoying if you have lots of side projects. Also, I'm currently working on a brand-new version, launching next month. You can sign up for the beta at https://beta.timingapp.com.