Based on the user reviews of the "Ruler" app, here are three pros and three cons: Pros: 1. Accurate measurements: Users praise the app's accuracy in providing precise measurements, saying it's "impeccable" and "spot on". 2. Easy to use: The app's intuitive interface and simplicity are praised by users, who find it "easy to navigate" and "a breeze to use". 3. Convenient: Users appreciate the convenience of having a virtual ruler on their device, saying it's "a lifesaver" and "so handy". Cons: 1. Limited functionality: Some users feel the app is too basic and lacks features, saying it's "too simple" and "not enough". 2. Distractions: A few users complain about the app's distractions, such as ads and notifications, which disrupt their measuring experience, saying it's "irksome". 3. Not suitable for all devices: Some users report issues with the app's compatibility on certain devices or operating systems, saying it's "not optimized" and "doesn't work as expected".