Delta is an iPhone app built for people with ADHD who struggle with screen time. It uses a Time Currency system where distracting apps — social media, games, streaming — are blocked by default through iOS Screen Time. To unlock them, you earn minutes by using productive apps like learning tools, fitness trackers, and reading apps. Time is the currency. The system enforces the rest.

Time Currency is Delta's core mechanic. Distracting apps are permanently blocked by default. Productive apps deposit minutes into your balance while you use them. You spend those minutes to unlock entertainment apps. The ratio of earning to spending is your Productivity ROI — one number that tells you how intentional your day really was.

Delta was built with ADHD in mind. ADHD brains struggle with willpower-based restrictions because impulse control requires sustained executive function — which ADHD directly impairs. Delta solves this by externalizing the decision: the system enforces limits at the iOS level so the choice to scroll is removed entirely. Hardcore Mode eliminates bypass options, which is critical for ADHD users who will always find escape hatches. The Time Currency system also creates immediate dopamine reward for productive behavior — matching the instant-feedback loop that ADHD brains respond to best.

Apple's Screen Time tracks usage and lets you set limits, but enforcement relies on willpower — you can tap 'Ignore Limit' at any time. Delta adds an economic layer: you must earn access to entertainment through productive use. Hardcore Mode removes the ability to override, making enforcement absolute.

Hardcore Mode is an optional setting that removes all bypass options. It disables Quick Peek — the ability to unlock any blocked app for 1 minute — and prevents you from removing apps from the block list while it's active. To regain access, you must earn Time Currency. No shortcuts, no exceptions. Designed for ADHD users who know they'll rationalize any loophole the system allows.

Yes — by default, social media, games, and streaming are permanently blocked. The only way to unlock them is to earn Time Currency through productive app use. Quick Peek lets you access any blocked app for 1 minute without spending your balance — useful when you genuinely need a quick check. The goal isn't abstinence. It's making access something you earn, not something you scroll into by habit.

Delta is free to download on the App Store. A Delta Pro subscription ($9.99/month) is available for access to premium features including advanced analytics, custom app categories, unlimited rules, and custom earning and spending rates per app.