1. ServiceFusionOfflineGuard
7/10 opportunityLightweight offline-first iOS/Android wrapper for Service Fusion that locally queues every job status update, photo, signature, product creation, and PDF so field techs never lose work on crashes, forced logouts, or network drops, then syncs exactly where left off.
- Who pays
- Owner-operators of US HVAC, plumbing, and electrical companies (typically 5-25 techs) who already pay $100-300+/mo for Service Fusion and are losing billable hours or paying overtime to redo lost field work.
- The evidence
- Multiple recent App Store reviews explicitly state the new Service Fusion app is buggy, loses data, camera fails, updates break core functionality, job status updates lag, PDFs cannot be opened, and users are switching back to the old app or looking for alternatives (signals 9-13,31-33).
- Why now
- The company just pushed a major rushed rewrite that introduced widespread offline and stability regressions; reviews show users are actively hunting replacements right now.
- Smallest shippable thing
- A React Native shell that embeds the existing Service Fusion web view, intercepts all API calls and photos locally with SQLite + WorkManager/BackgroundTasks, replays them on reconnect, and surfaces a 'resume from last good state' button. Ship in 3 weeks.
- Competition & the wedge
- Native Service Fusion app and generic offline wrappers; wedge is that Service Fusion will not cannibalize their own paid cloud product with a robust offline queue that reduces their server revenue and support load.
- Best case against it
- Market too small and already solved by simply staying on the old Service Fusion app that many reviewers say still works.
- Why it survives that
- The old app is no longer maintained and will eventually be killed; reviews show the new version has become the default, forcing users to either eat daily data loss or pay a reliable third-party skin — exactly the narrow wedge that scales across every Service Fusion customer.
- Cheapest test this week
- Post in 3 Service Fusion Facebook groups and private Slack communities for field service owners offering a $49/mo beta waitlist for an 'offline guarantee wrapper'; green-light if 8+ owners enter credit card details this week.
Demand receipts — open them yourself
- AppStore/Service Fusion By EverPro [1★ review of Service Fusion By EverPro · US] Buggy