PlanCheck
A consumer broadband app that runs a one-tap speed test, shows both MB/s and Mbps side by side, and translates the result into 'you got X% of the plan you pay for' — with an auto-generated complaint to your ISP when it dips below your threshold.
consumers on home broadband who suspect their ISP is overpromising or who want to verify their connection before complaining
- One-tap speed test showing MB/s, Mbps and the percentage of your plan actually delivered
- Rolling 7-day and 30-day history with hourly bands so you can spot peak-hour throttling
- Auto-generated complaint email to your ISP with the test data attached when delivery drops below your set threshold
- Crowd-sourced 'what people actually get' comparison by ISP and city, so users can see whether it's worth switching
The Dev.to post spread by explaining that ISPs sell in bits while downloads report in bytes — a 12.5% gap that confuses every non-technical broadband customer and drives millions of unjustified 'my internet is broken' support tickets.
Strong consumer frustration documented (Reddit r/Frugal threads, HowToGeek piece on open-source ISP rip-off app), and annual 'best speed test apps' roundups confirm sustained interest, but most users default to free tools like Fast.com/Ookla already bookmarked.This open-source app revealed my ISP was ripping me off ↗Best speed test apps in 2025: Test your internet speeds ↗
Crowded: SpeedProof already owns the 'ISP refund/legal-grade evidence' lane with automated 90-day testing and demand-letter generation, and several sites (mbpstombs.com, syntavox.com) already offer free complaint-letter generators — the Mbps/MBps educational angle is also saturated.SpeedProof — Get Your ISP Refund. Legal-Grade Internet Speed Evidence. ↗Internet Speed Complaint Letter | Free Broadband Template ↗
Mixed: SpeedProof monetizes via refund-cut, suggesting willingness to pay when a dollar value is attached, but standalone speed-test apps are notoriously hard to monetize (Ookla/Fast.com are free, often ISP-branded) and most users won't pay for a unit-conversion feature alone.SpeedProof — Get Your ISP Refund. Legal-Grade Internet Speed Evidence. ↗Best Internet Speed Tests of 2025 | BroadbandNow.com ↗
Likely durable: the bits-vs-bytes gap is structural, ISPs keep marketing in Mbps, and consumer frustration with broadband billing is a perennial complaint — but the underlying 'translation' insight is a one-time education that competitors can replicate trivially.
Trivial to build core: speed test APIs are well-documented, the Mbps/MBps math is one formula, and a complaint-letter template is straightforward LLM prompting — a weekend MVP is realistic, though legal-grade evidence collection (like SpeedProof) raises the bar.