Reddit completed the deprecation of r/all in April 2026, replacing the unfiltered firehose with an algorithmic Home/Popular feed. Power users on Reddit, Bluesky, and tech press are openly mourning the loss of the platform's last uncurated front page — old.reddit.com is the only remaining workaround and Reddit hasn't promised that survives long. There's an opening for a third-party 'real r/all' surfacer that pulls genuine cross-subreddit upvote velocity (no personalization, no engagement bait) the way redditors actually used to discover content.

builder note

Don't build it as a standalone site that has to talk to Reddit's API on every page load — Reddit will rate-limit you out of existence. Make it a browser extension that hits old.reddit.com using the user's own session, decorates the result with cross-subreddit aggregation client-side, and writes nothing back to a server. Zero infra cost, zero API politics.

landscape (3 existing solutions)

The cheap version of this is a public site that hits Reddit's `/r/all/.json?sort=hot` endpoint and renders without personalization. The trick is doing it sustainably under Reddit's API limits (and political mood) — likely via OAuth-the-user, browser-extension-as-aggregator, or scraping old.reddit while it lives. Whoever builds a stable home for 'just show me what's actually upvoted' will inherit the disenchanted power-user crowd.

old.reddit.com/r/all Workaround dependent on Reddit not killing the legacy site. Reddit has signaled this could go away. No mobile parity.
Reddit's official Home/Popular feed Algorithmic. Personalizes against the user, optimizes for engagement and ad-safety, not raw upvote signal. Exactly what r/all was supposed to NOT be.
Lemmy / Bluesky / Digg-2024 Different platforms with different content. Don't help redditors who want to watch what real-Reddit communities are upvoting.
sources (4)
other https://www.themeridiem.com/consumer-tech/2026/4/2/reddit-ki... "Reddit completes shift to algorithmic control" 2026-04-02
other https://www.techbuzz.ai/articles/reddit-kills-r-all-feed-to-... "kills r/all feed to push algorithmic personalization" 2026-04-03
other https://www.webpronews.com/reddit-kills-r-all-the-quiet-deat... "the internet's last uncurated front page" 2026-04-04
other https://www.techradar.com/computing/social-media/reddit-is-c... "still a way to access it if you know how" 2026-04-05
redditdiscoveryalgorithm-freepower-usersanti-personalization

Chrome silently writes a 4 GB Gemini Nano model (weights.bin) to disk on capable systems; manual deletion triggers automatic re-download, and the most user-visible 'AI Mode' pill in the address bar still routes to cloud servers anyway. Researchers argue the silent install likely violates EU ePrivacy and GDPR rules. There's clear demand for a small cross-platform tool that detects browser-bundled local AI models, lets users quarantine the weights, blocks redownload via OS-level rules, and reports back which features actually break (mostly nothing for typical users).

builder note

An extension can't fully prevent Chrome's redownload; the real product is an OS-level binary that watches the user-data directory plus a hosts/firewall block of the model CDN endpoints. Ship it as a one-click installer, not as 'click here to add this to your weekend project'.

landscape (3 existing solutions)

Today the only counter is per-vendor flag-hunting and accepting auto-redownload. There is no cross-browser tool that watches for, quarantines, and prevents redownload of bundled AI weights, and no SaaS/news source that tells users which browser-side AI models exist on their disk right now.

Manual deletion of weights.bin Chrome treats deletion as an error and re-downloads automatically
Disable Chrome AI flags Hidden behind chrome://flags; not surfaced in the standard UI; Microsoft Edge and Opera are quietly shipping similar payloads
Browser uninstall Nuclear option; many users are locked into Chrome via work or extensions
sources (4)
other https://www.tomshardware.com/tech-industry/cyber-security/go... "may violate EU law, waste thousands of kilowatts of energy" 2026-05-06
other https://www.thatprivacyguy.com/blog/chrome-silent-nano-insta... "silently installs a 4 GB AI model on your device without consent" 2026-05-04
hn https://news.ycombinator.com/item?id=48019219 "Just taking up 4 GiB of disk space without asking is problematic" 2026-05-05
chromegemini-nanoprivacystorageon-device-ai

Single HTML File Personal App Marketplace With Optional Cloud Sync Built In

browser extension real project •• multiple requests

A growing camp of indie hackers argue that 90% of the personal apps people actually use (workout log, pomodoro, expense tracker, habit tracker, mood journal) are 90% UI and 10% data. The infrastructure stack of React plus Supabase plus auth plus deploy that everyone reaches for is wildly overengineered. The opening is a marketplace of single-HTML-file personal apps (think 1990s shareware) that works offline by default, with one-click optional encrypted sync via a tiny shared backend.

builder note

Don't try to be a developer platform. The audience is end-users who buy a $4 HTML file and run it off their Dropbox. The bundled sync is the moat (encrypted, end-user-pays-pennies, capped at 1MB per app). Builders will come because the sync layer makes their app actually monetizable. The trap is over-spec-ing the runtime, do not invent a framework.

landscape (3 existing solutions)

This is positioned uncomfortably between 'static site generator' and 'app store'. Nobody owns it. The closest spiritual predecessor is the iOS App Store circa 2009: lots of $0.99 single-purpose tools that real people used.

TiddlyWiki The original single-HTML-file app, but it's one app (a wiki). No marketplace, no sync layer, no audience for the next 200 single-HTML apps.
Glitch / val.town Hosted code-snippet platforms aimed at developers. Not a marketplace for end-users to install personal HTML apps with one click.
PWA app stores (web.app, etc.) PWA discovery never happened. Browsers de-prioritized 'install' UX. Single HTML files dodge the PWA install dance entirely.
sources (1)
reddit https://reddit.com/r/AppIdeas/comments/1sx0uib/single_html_f... "most personal apps are 90% UI and 10% data sync" 2026-04-27
indieno-backendhtmlmarketplacelocal-first

Topic-Whitelist YouTube That AI-Filters Your Feed Instead of Begging the Algorithm

browser extension real project •• multiple requests

HN users keep openly saying they'd pay YouTube Premium pricing again, on top of Premium, if they could hand YouTube a whitelist and blacklist of topics and have an AI backend honor it... no kid content on adult accounts, no fake-DIY spam, no AI-slop, no rage-bait politics, yes specific creators, yes specific niches. Current 'Do Not Recommend,' SponsorBlock, Unhook, DF Tube all attack pieces of the problem but none let you curate by semantic topic with LLM understanding of the video content itself. Opportunity: a browser extension and mobile overlay that classifies YouTube content with an on-device or cheap cloud LLM and filters per user's topic lists.

builder note

Don't try to replace YouTube... overlay it. Ship a Chrome and Firefox extension plus a mobile Safari content blocker that rewrites the homepage and subscriptions grid using the user's topic rules. Push LLM classification to the user's own API key so your unit economics are clean. The first user who says 'my YouTube is finally sane again' will bring you a hundred more.

landscape (6 existing solutions)

The blockers market treats YouTube as a UI problem... hide shorts, hide comments, hide recommended. The real user pain is content-level: 'I want tech and cooking and travel, I do not want true crime, political rage, or AI-generated fake DIY.' Solving that requires classifying videos semantically (title + description + transcript snippet through an LLM) and producing a personal feed overlay. The extension that does this well, with the LLM cost pushed to the user's OpenAI or local Ollama key, is a clean $5-10/month product.

YouTube 'Do Not Recommend' / 'Not Interested' YouTube's own controls. Extensively documented as weak... the algorithm ignores or under-weights these signals within days.
Unhook / DF Tube Browser extensions that hide shorts, recommended, comments. Great for removing UI surfaces, no semantic filtering of individual videos.
SponsorBlock Skips sponsor segments inside videos. Doesn't filter the feed.
BlockTube / Video Blocker Channel and keyword blocklists. No semantic topic understanding... you have to enumerate every bad channel, which is whack-a-mole.
Brave's built-in YouTube controls Blocks ads and offers background play. No topic-level filtering layer.
Tangle / Ground News for video These exist for news articles... nothing equivalent has nailed it for video specifically.
sources (2)
hn https://news.ycombinator.com/item?id=47788329 "wish there was a whitelist and blacklist that could be followed with backend AI" 2026-04-16
hn https://news.ycombinator.com/item?id=47327704 "I'd pay for YT premium in a heartbeat if they let me tune the platform" 2026-03-10
youtubecontent-filteringbrowser-extensionllmalgorithmic-feed

IEP Version History and Parent-Facing Change Log for Special Ed Teachers

browser extension real project •• multiple requests

Special education teachers are reporting IEP and BIP drafts being silently altered in their district's IEP platforms (Frontline, SEAS, PowerSchool SpEd) and parents arriving at meetings being shown documents they were never part of drafting. Existing IEP software was built for compliance reporting to the state, not for practitioner audit trails or parent transparency. A lightweight extension or companion tool that snapshots IEP drafts locally, shows diffs, and generates a parent-shareable change log is a timely trust-and-safety play, especially with ESSA accountability reporting and growing IEP-based litigation.

builder note

Sell to teachers, not districts. A district procurement cycle will kill this idea before v1 ships... a teacher paying $8/month out of pocket because she got burned once won't. Make it a Chrome extension that works with Frontline and SEAS in the browser, ships nothing to a server, and emits parent-shareable PDFs. When a lawsuit cites your change log as evidence, that's your marketing.

landscape (5 existing solutions)

The IEP software category was designed for the district's compliance reporting needs. Practitioner-audit and parent-facing transparency features are an afterthought or nonexistent. The wedge is a teacher-installed browser extension or lightweight companion app that the district doesn't have to approve... just scrapes the IEP form in the browser, hashes and snapshots locally, and spits out diff PDFs the teacher can share with the parent.

Frontline Education IEP Dominant district IEP platform. Audit trails exist for district admins; practitioners and parents don't get a usable diff view of what changed and when.
PowerSchool Special Education (SEAS) Same story. Compliance-first, audit data exists in the backend but isn't surfaced as a 'show me what changed' practitioner feature.
IEP Direct Smaller district footprint. Similar audit-trail-buried-in-admin model.
Google Docs version history (teacher workaround) What many teachers actually do. Easy to see diffs, but the 'real' IEP lives in the district system, not in Docs, which is where the silent edits happen.
OSEP parent advocacy guides Policy, not tooling. Tells parents their rights... doesn't give them a diff view.
sources (3)
reddit https://www.reddit.com/r/specialed/comments/1s63enm/iep_chan... "someone has changed my IEP" 2026-03-25
reddit https://www.reddit.com/r/specialed/comments/1slsu68/im_feeli... "they already did an assessment and had a BIP plan typed" 2026-04-14
reddit https://www.reddit.com/r/specialed/comments/1sil0g7/new_to_i... "need some advice on how the process works" 2026-04-09
special-educationiepaudit-trailk12teacher-tools

Third-party unfiltered Reddit discovery feed after r/all deprecation

browser extension real project ••• trending

Reddit permanently killed r/all on April 2, 2026, redirecting all traffic to algorithmic Home/r/popular. Longtime users want a third-party client or web app that reconstructs the raw, unpersonalized upvote-ranked firehose across all public subs (old r/all behavior) using the public JSON API plus caching.

builder note

The moat here is not the feed but the rate-limit engineering. Ship a read-only PWA + browser extension that keeps a rolling 6-hour cache so a few hundred users can share one API budget, and charge $2/mo for notification keyword filters.

landscape (3 existing solutions)

No hosted replacement is positioning itself explicitly as the r/all discovery experience. Self-hosted forks exist but suffer from API rate limits and aren't packaged for casual users.

r/popular Curated, excludes NSFW and many niche subs, does not reproduce the raw cross-sub upvote firehose
old.reddit.com r/all Works today but Reddit has stated old.reddit is on borrowed time and most users are on new UI or mobile
Redlib / Libreddit forks Privacy-focused mirror but instances get rate-limited and blocked, not positioned as a discovery product
sources (3)
other https://support.reddithelp.com/hc/en-us/articles/47822249050... "all links to r/all now redirect to the Home feed" 2026-04-02
other https://tech.yahoo.com/social-media/articles/reddit-just-kil... "r/all represented that ethos... not what an algorithm decided" 2026-04-03
other https://nationaltoday.com/us/ca/los-angeles/news/2026/04/03/... "forcing algorithmic feeds... power users push back" 2026-04-03
redditdiscoveryanti-algorithmsurgesocial