Stack & Stanza
A screen-time-aware reading coach that locks out addictive apps during scheduled 'book windows' and tracks habits by depth, not just by volume.
knowledge workers and parents who want to read more but lose hours to their phone
- scheduled book windows that block distracting apps with a one-tap override
- depth-based goals (pages understood, notes taken, time on page) instead of just book count
- unified tracker across paperback, Kindle, and audiobook with a carry-anywhere queue
- weekly 'quit or commit' prompts so abandoned books stop haunting you
The HN essay (116 points) explicitly frames reading as a phone-vs-book trade, and phone distraction is now a chronic, year-over-year problem.
Multiple adjacent categories show real, monetized demand: HN essay exists, Opal/ScreenZen/AppBlock have paid user bases, and Read2Unlock for kids explicitly markets the reading-unlocks-apps angle.Opal vs ScreenZen: Premium Focus App vs Free Friction ↗Read to Unlock | Unlock Apps by Reading ↗
Direct competition already exists: Read2Unlock solves the same loop (apps unlock after reading) for parents/kids, and the readtounlock.com blog post explicitly critiques Opal/AppBlock/One Sec as the adult blockers they aim to improve upon — leaving little true whitespace for adults.Read2Unlock — Kids Read First. Apps Unlock After. ↗Screen Time Control App That Makes You Read More ↗
Proven willingness to pay in adjacent apps — Opal is positioned as 'among the most expensive' subscriptions in the focus category, and Read2Unlock converts families from free to paid for the unlock + AI tracking tier.Opal Pricing ↗Read2Unlock — Kids Read First. Apps Unlock After. ↗
Phone distraction is a multi-year chronic problem (Opal, ScreenZen, One Sec have all grown into durable businesses), and reading-as-antidote framing is reinforced annually by HN/podcast essays — strong secular tailwind.ScreenZen - Stop Mindless Scrolling & Reclaim Your Time ↗App that limits screen time - AppBlock ↗
Buildable: app-blocking, scheduled sessions, and reading tracking are all proven primitives (Read2Unlock ships them on Android/Amazon Fire); iOS Screen Time API adds friction vs Android but the core stack is tractable for a small team.Read2Unlock — Kids Read First. Apps Unlock After. ↗