Founder and developer here: as an intermittent faster, weight lifter, and amateur cook, I always found the leading diet trackers very limited. They made everything about my tracking difficult: from logging foods, to counting net carbs, to varying my caloric targets per day.

So I built Joy. The key feature is its flexibility. Joy allows you to track any diet under the sun. This includes diet groups such as:

1. Keto-ers: it automatically calculates net carbs for all foods, and lets you set targets for this metric.

2. Intermittent fasters: you can set different caloric and macro goals depending on the day of the week. You can switch individual days easily.

3. Cooks: creating recipes is very easy. Moreover, modifying or experimenting with recipes as one-offs - while still tracking them - is supported. I've often cooked the same pasta only changing one ingredient. Or the proportions.

4. Bulkers: athletes and people from all walks of life often want to gain weight - in a controlled manner. Most diet trackers assume you want to lose weight and build all UX towards that goal. Not Joy. Calculating what you need to gain weight is even built into the app.

I also identified and developed features that would prove useful:

1. No obnoxious ads slowing down the experience. Instead, charge money for a service that interested people use every day. After announcing these changes, feedback was largely positive.

2. Nutritional data accuracy: I source from a few (commercial) providers, but they're all professionally curated. The actual search algorithm needs work, but once you land on an item, its data is vastly more accurate than many of the user-contributed foods of the competition. Once I figure out a sustainable approach for user-contributed foods - perhaps with a voting system à la Stack Overflow - I will add this feature.

3. Speed: the entire UX is built around being able to quickly log your food. The harder and longer this takes, the more likely you are to deviate from your diet plans. Joy does require some familiarization, but once you get the hang of it, adding foods is incredibly quick. You can copy, cut, expand, contract, and distribute meals in seconds. Repetition soon becomes second nature.

4. Sharing: every individual piece of content should be shareable, not an all or nothing approach like the alternatives. For example, here is one of my favorite recipes, no login needed: https://www.joyapp.com/share/VMsGfhgdzvErmdqvxi8wSf/

It's a web app, as well as an Android and iOS cordova app, see here:

1. https://www.joyapp.com

2. https://play.google.com/store/apps/details?id=com.joyapp.and...

3. https://itunes.apple.com/us/app/joy-health-tracker/id9551727...

I'll be around for questions all day. Enjoy!