Nice interface, smooth transitions and original way to set date. Can have a white (like pictures) or a black background. Free version comes with ads but very small, which is a plus. It has the original 3 theories, not several unknown others like some apps. Other than that it looks pretty cool, very nice use of color on the white background, I like it a lot! And it's clean, there's somewhat of a hidden menu on bottom of screen with simple iPhone icon (three dots). Pretty hard to not understand these super simple functions!!!Why 4 stars? -I haven't checked it with the actually theoretical equation. -The full version just lets one save dates, albeit it's more save slots than the competitor, why no save function? And if I did buy it, why not idk 99 saves? Or infinite saves? Seems silly to charge for. But those are honestly the only reasons. It's a great app for what one is looking for in a biorhythm app.

This app is exactly what it says: a simple graph of the original biorhythm of the person whose birth date is entered. Very simple.I would have given a 5 if: a) you could put in multiple birth dates without updating b) there was a button for more information about biorhythms and how they are created (or what they are based on besides a date) c) you could somehow use the information in day to day life.Possible ideas: 1) List of dates a person should be careful (like immunity low when all 3 are at the bottom of a wave) 2) List of best dates for big decisions or life events 3) somehow integrating biorhythm into a calendar? 4) notifications to you on days to be careful, days when you will have difficulty making decisions, days not to work out, or best day to have a workout, etc.

Not worth the two bucks you pay. Got it to crash within the first 5 minutes of having it on my iPad. Lack of instructions either in app or on developer website is a huge detractor. That’s why it took me five minutes to crash it; had to figure out how to add people, DOB and then page/scroll through their names both slow and fast.Crash it by selecting “slow” so that it rolls pages into view rather than scrolling from left to right. Just flipping back and forth between people in the slow mode caused the graphics to disappear and crash the app. Had to restart th app to get it to go again.Developer has lots of work to do to make this as good as a bottle of “$2 Chuck”.

Always gives a good chart! Very flexible, gives you something to think about!