Endless Ads for Expensive Subscription Version
Used to be a very useful app, but is now hobbled by ads for upgrades and other products. I can see no reason to pay for a subscription for such a basic function as habit tracking, especially when there are excellent alternatives on the App Store.
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+1 star for immediate developer response - impressed by a dev who actually reads comments.
dot.mac about
Productive - Habit Tracker, v1.8