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Nested lineage
System, line, station, visit, finding. Every layer hangs from the one above, so revising a note never snaps the chain.
TubeHeirloom Lineage keeps each metro as a nested record of systems, lines, stations, visits and findings, so what you learned in one city sharpens the next descent.
System, line, station, visit, finding. Every layer hangs from the one above, so revising a note never snaps the chain.
Record architecture mood, era bands, signage character and transfer grain in words you can rewrite whenever memory sharpens.
Surface corridors never ridden, stations never described and wishlist platforms still waiting for a first documented episode.
Set two networks side by side and watch visit density pulse across each of your threads.
Park dormant systems in the sidings until curiosity pulls them back onto the platform.
Everything lives on your device. No accounts, no cloud, no one reading over your shoulder.
Hatched dot = station without a description yet. Pulse strength = visit count. Shelve a system to grey it out.
🚇We are a small crew of metro obsessives who got tired of half-recalled platforms and vanishing transfer notes. TubeHeirloom Lineage is the vault we wished we had on our first descent.
🧭Our mission is to let explorers keep every underground network as a living lineage of systems, lines, stations, visits and findings, so knowledge from one city carries into the next.
📝You get revisable notes on architecture mood, era bands, signage and transfer grain, a radar for corridors never ridden, a two-network split view, and a siding for dormant systems.
✨Descend once. Remember every line.
Effective Date: September 2026
TubeHeirloom Lineage does not collect, store or share any data. Everything you write in the app works locally on your device.
None. We do not collect personal information, usage data, location, device identifiers or the contents of your systems, lines, stations, visits and notes.
Because nothing is collected, nothing is used, analyzed, profiled or sold. Your research is yours alone.
All lineage records and findings are kept only on your device. There is no cloud storage and no server that receives your data.
The app includes no analytics, advertising networks or trackers, and shares nothing with outside parties.
Since the app operates entirely offline on your device, your notes stay protected by your device's own security. We recommend a screen lock and regular device backups.
We collect nothing from anyone, including children under 13, which keeps the app consistent with COPPA principles.
You hold all the controls. There are no accounts to manage, and uninstalling the app deletes all of its local data.
If this policy changes, we will update the effective date above. Any update will keep our core promise of no data collection unless clearly stated.
Questions about privacy? Write to privacy@tubeheirloomlineageapp.com.
💌 Got a question, a station tip or an idea for the next line? Drop us a message, we love hearing from fellow explorers.
⏱️ We reply to every message within 24 to 48 hours.