From site photos to submission-ready PDFs: I built a local-first app with Expo and React Native

Oskra | オスクラ — Mon, 20 Apr 2026 14:40:34 +0000

I recently released Repolog on both the App Store and Google Play.

It is a local-first photo report app for field workers.

The idea is simple: take site photos, add comments, and export a clean A4/Letter PDF report from your phone.

I built it for people working in:

construction
maintenance
inspections
cleaning
property and site visits

In many real-world workflows, photos end up scattered across the camera roll, chat apps, and notes.

That makes reporting slow, inconsistent, and hard to review later.

So I wanted to build something that keeps the workflow simple:

snap photos on site
add comments and basic details
keep photos and notes in one report
export a submission-ready PDF
work without creating an account

A few things I cared about while building it:

local-first: I wanted the app to stay useful without forcing users into a cloud workflow
evidence-first PDF layout: photos stay uncropped so the original context is preserved
phone-first reporting: the whole flow should work on-site, not only later on a PC
clean export: the goal is not just “make a PDF,” but “make a PDF people can actually submit”

Tech stack:

Expo
React Native
SQLite
RevenueCat
AdMob

It also supports 19 languages, because field reporting is a very global use case.

If you build tools for contractors, inspectors, maintenance teams, or other field workflows, I would love your feedback:

What is the most frustrating part of photo reporting today?
Would your team prefer one large photo per page or two photos per page?
What metadata matters most in a site report?

App Store:
https://apps.apple.com/us/app/repolog-photo-site-reports/id6760099822

Google Play:
https://play.google.com/store/apps/details?id=com.dooooraku.repolog

[Showdev] Time-Zone Hover — Stop time-zone confusion: hover any time to see yours (copy 12/24/ISO)

Oskra | オスクラ — Thu, 09 Oct 2025 13:52:13 +0000

Hover any time string on any website → instantly see your local time + zone. One click to copy in 12-hour / 24-hour / ISO 8601. Pro adds defaults & per-site control.

Why I built this

I kept asking “Whose 3 PM is this?” across remote teams. Time‑Zone Hover is a tiny utility to remove that friction without extra clicks or tab switching.

Demo & install

Chrome Web Store: https://chromewebstore.google.com/detail/time-zone-hover/hbaocjmflampngapmeeegnpphpmkmmff?authuser=0&hl

What it does

Hover any time string (e.g., “3:30 PM”, “18:00”, “5 hours ago”) on any site to see your local time
Shows your time zone ID (e.g., Asia/Tokyo)
One‑click copy in 12‑hour / 24‑hour / ISO 8601
Clean options UI; Pro adds default format, per‑site enable/disable, and import/export

How it works (high level)

Chrome MV3: background service worker + content script
Parses common absolute and relative time patterns
Saves preferences via chrome.storage

Privacy & permissions

Permissions: storage (to save your settings)
No tracking: no analytics beacons, no external calls for tooltips

How to use

Install the extension from the Chrome Web Store
Open any site with time strings (news, issue trackers, social, etc.)
Hover the time → see your local time + zone
Click Copy to copy in the shown format (12/24/ISO)
Open Options to choose theme and (Pro) set your default copy format
(Pro) Use per‑site control to enable/disable or exclude domains

Pro features (lifetime)

Default copy format (12/24/ISO 8601)
Per‑site enable/disable and exclusions
Import/export settings

Glossary (for clarity)

12‑hour / 24‑hour: time formats (3:30 PM vs 15:30)
ISO 8601: international date‑time standard, e.g., 2025-10-09T15:30:00+09:00
Time zone ID: canonical zone like Asia/Tokyo that handles DST correctly

Roadmap

Custom parsing rules per site
Keyboard shortcut to copy in default format
More locales and relative‑time patterns

If this reduces your time‑zone confusion even a bit, I’d love a comment or a ⭐ on the store. Thanks for reading!

DEV Community: Oskra | オスクラ