This app is a miracle. I needed a simple meditation timer with uneven intervals. This allows me to set different interval times for different breath work and focus during a 21 minute session. I can set the intervals precisely plus adhere to an overall time. The default gong is perfection. The ads are unobtrusive, so they are there, yet do not impede your meditation. I have no need to look at anything and can go deeper through the different breath stages. It’s amazing how difficult it was to find something like this. Thank you! I’d like to support the maker. Am unsure of the price? Doesn’t say if I choose to unlock ad-free. Highly recommend this app for meditators who are self guided and explore different phases during a practice.