| 1. NitroxLog: Dive Gas Planner |
$1k-$3k/mo
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85/100 · Highly approachable · prosumer companion · one-time + IAP · niche community
Nitrox-certified recreational and tech divers who plan gas blends before every dive. Scuba forums, dive shops, and local dive club chat groups organized around certification levels
The pain: Divers hand-calculate MOD and best mix on slates or generic calculators, then log fills separately in notebooks Why now: Offline-first calculators plus a Lock Screen widget for last dive summary fit boat-side iPhone habits
How to build
Fast MVP: MOD/best-mix calculator, per-dive log (depth, time, blend, tank ID), simple history list
Monetization: one-time + IAP
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How to ship
Distribution wedge: Demo thread in ScubaBoard and local dive shop Facebook groups
Signals: ScubaBoard nitrox calculator threads · r/scuba dive log spreadsheet requests (reddit, forum)
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Proof: ScubaBoard and r/scuba threads constantly share homemade nitrox spreadsheets and MOD calculator recommendations
Portfolio fit: Prosumer trade-tool slot distinct from land-based outdoor trackers
| “Dial in your nitrox mix and log every dive without a spreadsheet.” |
Why this is approachable: Pure math plus form-based logging keeps scope tiny and shippable fast
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| 2. RoastCurve: Home Bean Roasting Log |
$1k-$3k/mo
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83/100 · Approachable with focus · hobby companion · paid download · App Store SEO
Home coffee roasters using stovetop, drum, or air roasters to chart roast profiles. r/roasting and home roaster Discord servers trading first-crack timing notes
The pain: Roasters scribble first-crack time, drop temp, and bean origin on sticky notes then forget what worked last batch Why now: A one-tap timer with milestone buttons (first crack, second crack, drop) is a perfect iPhone-in-kitchen moment
How to build
Fast MVP: Timer with milestone taps, bean/origin notes, batch history list, simple curve chart
Monetization: paid download
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How to ship
Distribution wedge: App Store SEO around 'coffee roast log' plus demo in r/roasting
Signals: r/roasting roast curve logging requests · home roaster Discord batch notes (reddit)
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Proof: r/roasting threads repeatedly ask for a simple way to log roast curves without a laptop at the stove
Portfolio fit: Hobby companion slot distinct from existing espresso dial-in tools
| “Tap first crack, tap drop, and finally remember what made that batch great.” |
Why this is approachable: Timer plus milestone taps and a history list is a lean, well-scoped MVP
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| 3. PackLog: FPV Flight & Battery Tracker |
$2k-$5k/mo
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80/100 · Approachable with focus · prosumer companion · paid subscription · YouTube shorts
FPV freestyle and racing drone pilots managing lipo battery cycles and crash logs. FPV Discord servers and freestyle pilot YouTube community
The pain: Pilots track battery cycle counts and internal resistance across scattered spreadsheets to avoid puffed or fire-risk packs Why now: Per-battery QR tagging plus a cycle-count widget turns a safety chore into a quick daily glance
How to build
Fast MVP: Battery profile (cycles, voltage), flight session log, crash photo log, cycle-count widget
Monetization: paid subscription
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How to ship
Distribution wedge: YouTube shorts demoing a crash log photo tied to a flight session
Signals: FPV Discord battery cycle spreadsheets · crash log debrief videos (discord, youtube)
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Proof: FPV Discord channels debate when to retire a battery with shared cycle-count spreadsheets
Portfolio fit: Prosumer trade companion distinct from vehicle and gear logging apps
| “Track every battery cycle before it becomes a fireball.” |
Why this is approachable: Core logging loop is easy; battery safety math can stay simple at launch
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| 4. WindsOfMahjong: Score Keeper |
$1k-$3k/mo
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78/100 · Approachable with focus · social micro-game · annual membership · niche community
American Mahjong (NMJL) players running weekly home games. Women's mahjong clubs, country club leagues, and Facebook mahjong groups
The pain: Groups manually tally complex NMJL scoring and track wind rotation with paper pads that get lost or smudged Why now: Quick multi-player entry UI plus an annual NMJL card IAP creates a natural yearly re-engagement hook
How to build
Fast MVP: 4-player score entry, wind rotation tracker, running totals, NMJL card reference screen
Monetization: annual membership
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How to ship
Distribution wedge: Demo video posted directly in mahjong Facebook groups
Signals: mahjong Facebook group score pad discussions · annual NMJL card update threads (facebook-group)
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Proof: Facebook groups like American Mahjong Players repeatedly debate score pad apps and annual card updates
Portfolio fit: Social micro-game niche distinct from existing board game and card trackers
| “Never lose track of the wind or the score again at mahjong night.” |
Why this is approachable: Score entry UI is simple to build but needs careful NMJL rule accuracy
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| 5. Vinyl Pressing Notes |
$2k-$5k/mo
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83/100 · Approachable with focus · collector / fandom · paid download · creator-led
Vinyl collectors comparing pressings, condition notes, and listening copies. Collectors gather in record forums, Discogs-adjacent communities, YouTube comments, and shop groups.
The pain: Collectors forget pressing details, condition notes, and which copy actually sounds best. Why now: Camera capture and barcode-style search can make private collection notes faster.
How to build
Fast MVP: Pressing notes, condition photos, listening tags, wishlist, and shop crate notes.
Monetization: $24.99 paid download with optional cloud backup.
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How to ship
Distribution wedge: Record store partnerships and YouTube collector demos.
Signals: Collectors comparing variants · Record store groups sharing pressing details (forum, youtube)
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Proof: Vinyl communities constantly compare matrix numbers, pressings, variants, and listening notes.
Portfolio fit: A collector app with deep niche language and natural shop/community channels.
| “Private pressing notes for collectors who know the copy matters.” |
Why this is approachable: Narrow audience, clear phone-native workflow, and a direct first distribution channel.
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| 6. Sky Session Planner |
$2k-$6k/mo
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82/100 · Approachable with focus · hobby companion · annual membership · newsletter-led
Amateur astronomy hobbyists planning observing sessions around targets and conditions. Backyard observers gather in clubs, astronomy forums, YouTube channels, and local sky-watch groups.
The pain: Observers miss good viewing windows because target lists, weather, moon phase, and gear notes are scattered. Why now: Location, weather APIs, widgets, and notifications make session planning phone-native.
How to build
Fast MVP: Target list, session checklist, moon/weather glance, gear notes, and observation log.
Monetization: $29/yr with a free starter target list.
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How to ship
Distribution wedge: Astronomy club newsletters and App Store SEO around observing planner.
Signals: Astronomy club observing lists · Forum posts asking for tonight's targets (forum, newsletter)
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Proof: Astronomy communities regularly ask what to observe tonight and how to plan sessions.
Portfolio fit: A narrow planning utility with seasonal retention and club-led distribution.
| “Know what to observe before the clear sky disappears.” |
Why this is approachable: Narrow audience, clear phone-native workflow, and a direct first distribution channel.
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| 7. Brick Build Inventory |
$3k-$7k/mo
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84/100 · Approachable with focus · collector utility · freemium with unlock · YouTube shorts
Adult brick builders tracking loose parts, projects, and wanted pieces. Builders cluster in fan forums, local clubs, YouTube channels, and marketplace communities.
The pain: Builders lose track of parts, project bins, and missing pieces across multiple builds. Why now: Camera scanning and quick bin notes make phone capture easier in a build room.
How to build
Fast MVP: Project bins, part notes, wanted list, photo capture, and build progress.
Monetization: $4.99/mo for unlimited projects and sync.
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How to ship
Distribution wedge: Builder YouTube demos and fan community posts around inventory workflows.
Signals: Builders sharing storage systems · Forum threads about missing parts and project bins (youtube, forum)
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Proof: Fan communities share storage systems, wanted lists, and project inventory spreadsheets.
Portfolio fit: A collector-workflow app with strong visual demos and paid hobbyist behavior.
| “A pocket inventory for the project bins taking over your build room.” |
Why this is approachable: Narrow audience, clear phone-native workflow, and a direct first distribution channel.
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