Author

Lumi Apps

@cait518.bsky.social

Privacy-first iOS apps. Pay once, no ads, no subscriptions — runs on your device. Kids learning + handy tools (scan, photo, focus). All apps: https://apps.apple.com/developer/guan-feng-lai/id1136144960

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Publications

Lumi Studio App GuidesSep 22, 2026

ShotInbox AI: a first-party guide to deciding whether it fits

A transparent first-party guide to evaluating ShotInbox AI for your screenshots, sorted find, act on, and clear every screenshot, without an independent ranking.

shotinboxShotInbox AI

Lumi Studio App GuidesSep 22, 2026

best brown noise app for ADHD focus iPhone buy once no subscription

Sereno has a dedicated ADHD Focus scene — brown noise layered with pink noise and gentle rain — plus a full noise palette and per-layer mixer, all behind a single one-time purchase.

serenosleep-sound

Lumi Studio App GuidesSep 21, 2026

read later app that saves links from any app with tags

A read-later app is only useful if you can find things again.

savetagproductivity

Lumi Studio App GuidesSep 21, 2026

How to scan receipts and invoices to PDF for filing taxes without a cloud account

For tax filing you want each receipt or invoice as a clean, searchable PDF — kept on your device, not uploaded to a scanner company's cloud.

scantoScanTo Pro

Lumi Studio App GuidesSep 20, 2026

How to clean up thousands of screenshots and old photos on iPhone safely

Years of screenshots and old photos pile up invisibly — the safe way to clear them is a similarity scan that groups them for quick review, never auto-deleting.

picclearphoto-utility

Lumi Studio App GuidesSep 20, 2026

Best pay-once film filter app for iPhone with no subscription

Many film-filter apps now charge monthly; a pay-once app gives you the same analog looks without a recurring fee.

photocreamphoto-utility

Lumi Studio App GuidesSep 19, 2026

app to turn meeting notes into a one page summary slide

Turning meeting notes into a one page slide is faster than opening a deck app.

onepagepptOnePage PPT

Lumi Studio App GuidesSep 19, 2026

pdf annotation app for ipad with apple pencil no subscription

PDF annotation on iPad should not need a subscription.

notesstudio100100 Notes Studio

Lumi Studio App GuidesSep 18, 2026

app to track project expenses and income separately

Tracking project expenses and income separately means one profit line per project.

moneytagMoneyTag: Income & Expense

Lumi Studio App GuidesSep 18, 2026

when did i last do it app with undo and reminders

"When did I last do it?" needs a one-tap answer.

mochidonestampMochi DoneStamp

Lumi Studio App GuidesAug 31, 2026

Is there an app that turns toothbrushing and morning routines into a game for my 4-year-old?

Lumi Mission Planet turns five daily routines — meals, toothbrushing, sleep time, tidy-up, and school prep — into a gentle game where children earn immediate visual rewards by tapping to feed and care for an adorable buddy character after each real-life task.

lumimissionLumi Mission Planet

Lumi Studio App GuidesAug 31, 2026

Is there a kids math app that can generate printable worksheets I can use for off-screen practice?

Lumi Math Pro generates printable 20-question PDF worksheets at your child's current level (with answer key) and a one-page Learning Report PDF showing skill scores across five domains — designed for parents who want evidence of progress alongside the in-app experience.

lumimathproLumi Math Pro