Solo developer at DoubleHash — pay-once apps, no subscriptions

Phillip Lim • Peerlist

<p>Roll Sorter is a photo cleaner for Android: swipe through your camera roll one photo at a time, like slides on a lightbox — left to mark for deletion, right to keep. Your library opens as month-by-month boxes and picks up where you left off. Nothing is deleted until you review the marked photos, and they stay in Recently Deleted for 30 days; undo as many steps as you like. Tools find similar and duplicate photos (suggesting the sharpest shot), screenshots and large videos. Everything happens on your phone: no account, no ads, no uploads. Swiping and albums are free; a one-time lifetime pass removes the daily trash limit and unlocks the tools. No subscription.</p>

Roll Sorter — Photo Cleaner

<p>Nightchart is a noise meter and decibel (dB) meter for Android that logs neighbor noise all night — footsteps, music, barking — and checks it against real noise limits (Korea's apartment noise rules, the UK Noise Act night-time level, or WHO guidelines). Night Watch logs only the moments over the limit while you sleep, a one-tap incident log saves the time, type and a note, and sessions and incidents export as PDF reports ready to hand in. It is also a real sound level meter: A/C/Z weighting, Fast/Slow, LCpeak, octave bands and NIOSH hearing exposure. No audio is recorded by default, and it is honest that a phone is not a certified meter. Measuring and the incident log are always free; recording sessions, Night Watch and PDF reports come with a one-time lifetime pass. No subscription, ads or account.</p>