Any plans for iOS?
Yes. That's stage 3 of the release plan, but that's hold until we finish restructuring.
How does the 15 session log limitation work?
Once you've logged 15 workout sessions either through the live tracker or the notebook, the app will disable navigation to the workout page and remove the ability to create new data until you upgrade to a subscription.
Why not just make the app free with ads?
For JustFitness to earn revenue through serving ads, you would have to click the ads. To increase the likelihood of you clicking the ads, I would have to allow a third party to run a bit of code to collect your data to serve more relevant ads. JustFitness is a privacy-focused application that only seeks to earn revenue from you directly with your consent. Utilizing an ad network would go against that notion.