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Installable Web Apps Without the App Store

Installable web apps that work offline, feel native, and skip the app store. Service workers, push notifications, and sub-2s load times on any device.

Timeline 2–5 weeks
Investment $2,000–$7,000
Vanilla JSAstroNext.jsService WorkersWeb App ManifestIndexedDB
📥
Installable app

Add-to-homescreen prompt, app manifest, and icons for Android and iOS. Feels like a native app.

📡
Offline support

Service worker caching strategy — content available even without internet connection.

🔔
Push notifications

Web push notifications for re-engagement — streak reminders, new content alerts, or custom triggers.

Native-like performance

App shell architecture, lazy loading, and smooth animations — no janky web feel.

01
App shell design

Define what loads instantly vs. what loads on demand. Core UX must work offline.

02
Service worker strategy

Cache-first or network-first per resource type. Offline fallbacks for all critical paths.

03
Manifest & install flow

Web app manifest, icons for all sizes, install prompt logic and timing.

04
Testing & deploy

Lighthouse PWA audit, cross-device testing, GitHub Pages or custom domain deployment.

Case Study
Estonian Learning PWA Suite

4 PWAs built with vanilla JS on GitHub Pages: number drills, pronoun trainer, countries/nationalities, and Estonian Verbs. SM-2 spaced repetition, Google TTS audio, offline support, and gamification.

4 PWAs · Zero hosting cost · Full offline support
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Depends on your use case. PWAs are cheaper to build, update instantly, and require no app store. Native apps have better device integration and discoverability. For content/learning tools, PWAs often win.
Yes, with limitations. iOS supports service workers and add-to-homescreen. Push notifications are supported from iOS 16.4+. I'll be honest about what works and what doesn't on each platform.
Yes — modern PWAs can access camera, microphone, geolocation, and sensors via Web APIs. More limited than native but sufficient for most use cases.
PWAs update automatically when the user is online — no app store approval needed. Users always get the latest version.
Usually yes — adding a service worker and manifest to an existing site is straightforward if the architecture allows it.
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