It also comes in a free time limited version so if you don't know if it will help you...
Here is what the creator of the app posted on Playstore:
Producer Tools takes care of the tedious parts of making music, leaving you free to focus on being creative. Producer Tools is like your brainy studio assistant -- someone you can ask "Quick, what frequency is A sharp?," "How many milliseconds is a dotted 1/16th note at 135 b.p.m.?," or "What should I boost to make the kick drum bigger?"The app's functions include a delay calculator, a chord reference, an equalization guide, a frequency-to-note translator, and a harmonic mixing wheel. All of Producer Tools' features are optimized for working in digital audio workstations like Ableton Live, FL Studio, and Logic: all the notes in the chord reference are MIDI-friendly sharps, for example, and the delay calculator gives you both milliseconds and Hertz -- perfect for synchronizing LFOs.
Producer Tools is designed to help speed up the production process, whether you're an experienced electronic music producer or you're just starting out. Download it and boost your workflow to the next level.