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offline-app

Offline voice changer app for Android and iOS with 24 voice presets (Helium, Robot, Demon, Ghost, Megaphone, Telephone and more), drag-and-drop effect chain, pitch/reverb/echo/distortion sliders, recording, audio import, direct sharing to WhatsApp/Telegram/Discord. Built with Flutter, native DSP. No ads, no internet, no tracking. Free download on Google Play and the App Store.

Fast offline percentage calculator for Android and iOS. Task-shaped templates for sale price, original price, discount, markup, margin, VAT, percentage change, reverse percentage, tip split, compound growth, and percentage points. Built with Flutter. Free, no ads, no tracking, no account. Free download on Google Play and the App Store.

Offline trip cost calculator for Android and iOS. Compute fuel costs from distance + consumption + price, split gas between carpool passengers, add tolls and parking, save vehicles and routes, review trip history. Both metric (km, L/100 km) and imperial (mi, mpg) units. Built with Flutter. No ads, no tracking, no account, no cloud sync. Free download on Google Play and the App Store.

Offline compass app for Android and iOS with True North (magnetic declination via World Magnetic Model 2025), real-time microtesla field-strength meter, magnetic interference detection, and Pin Direction bearing lock. Built with Flutter. No ads, no tracking, fully offline. Free download on Google Play and the App Store.

Laundry Symbols & Care Labels — free offline Android app that scans clothing care labels with the camera and explains all 44 ISO 3758 / GINETEX symbols in plain language. My Closet care profiles, Wash Sorter and a daily quiz. No account, no ads, no tracking.

Birthday Counter: Days Until — offline birthday countdown for iOS with Home Screen and Lock Screen widgets, milestone alerts and exact age. Free, no ads, no tracking, no account.

Video to Photo: Save Frames — extract full-resolution stills from any video up to 8K, frame-accurate stepping, batch export, sharpness detection, EXIF preserved. Free iOS app, offline, no watermark.

Image Converter: Offline Batch — convert HEIC, WebP, AVIF, JXL, RAW and more entirely on device. Unlimited batch, compress to target size, EXIF control. Free iOS app, no upload, no ads.

Mirror — Makeup & Light: free offline iPhone mirror app with a real ring light, warm/daylight/cool tones, 1x–10x pinch zoom, freeze-frame and brow guide grid. No photos, no account, no tracking. By lapnito.cz s.r.o.

All Country Flags: Learn 254 — offline flag quiz and learning app with spaced repetition, 35 similar-flag groups, capitals mode, world heat map and 254 countries + territories. No account, no tracking. By lapnito.cz s.r.o.

Simple Android App for MKU Christian Union