It is now even easier to free up space on your IOS device like iPhones or iPads as long as you are running iOS 11, just go to settings and then go to iTunes & App Store, there just turn on offload unused Apps.
This only offloads the Apps you have not used in a long time, But keeps the App data so if you ever decide to start using the app, you just need to download it and your previous data will be available.
A metronome is any device that produces regular, metrical ticks (beats, clicks) — settable in beats per minute. These ticks represent a fixed, regular aural pulse; some metronomes also include synchronized visual motion (e.g. pendulum-swing). The metronome dates from the early 9th century, Abbas ibn Firnas (810-887 AD), was patented by Johann Maelzel in 1815 as a tool for musicians, under the title “Instrument/Machine for the Improvement of all Musical Performance, called Metronome”. – As per Wikipedia
Instead of buying the Hardware or Software for your Computer or Mobile, you could just type “Metronome” in Google search and Voila you have one Free of Cost 🙂