Rattlewise: Noise Finder

Find any rattle, then prove it's gone. Sweep a tone, see the buzz on a live spectrum, and get a before/after report — "peak −14 dB at 280 Hz." All on-device.

Find the rattle. Fix it. Prove it's gone — all on your iPhone.

Rattlewise turns your phone into a buzz & rattle source-finder for cars, EVs, vans, and homes. Sweep a tone to make the rattle resonate, watch it lock onto a live spectrum, then get a ranked "press here / tighten here" checklist — the step every other app skips. 100% on-device. No account. No cloud.

▸ FIND THE BUZZ Make the rattle reveal itself, then see it on a live graph.

• Frequency sweep — play a tone that makes loose trim, panels, and clips resonate • Live FFT spectrum — the buzz shows up as a peak you can actually see • Peak lock — the app tracks the exact frequency, even for intermittent rattles • Accelerometer confirm — press your phone to a panel to feel which part is buzzing

▸ KNOW WHAT TO FIX The part rivals leave out: turning the graph into a plan.

• Ranked likely culprits — plain English, with a confidence level for each • Guided checklist — press here, tighten here, add felt tape, reseat the clip • Honest by design — "likely culprits, ranked," never a fake guaranteed diagnosis • Re-measure prompts — check your work after every adjustment

▸ PROVE IT'S GONE The shareable proof no free tone generator can give you.

• Before/after report — overlaid spectra with the quantified drop: "peak −14 dB at 280 Hz" • Share as PDF or image — settle it with a spouse, a forum, a mechanic, or a buyer • Vehicle & space log — every buzz you've found and proven fixed, per car, van, or room • Export PDF / CSV — keep your own maintenance record

▸ PRIVATE & OFFLINE Your microphone audio and motion data never leave your iPhone. No account, no sign-up, no backend, no tracking, no ads. Works fully offline.

▸ WHAT IT IS (AND ISN'T) Rattlewise is a stationary cabin/room rattle finder — use it parked, never while driving. It surfaces likely sources, ranked by confidence; it is not a lab instrument or a guaranteed diagnosis, and makes no safety or medical claims.

▸ PRICING

FREE: • Live FFT spectrum + peak tracking • Guided tone & frequency sweep (the full resonance trick — never paywalled) • One live "find the buzz" session at a time • Diagnosis preview (top likely culprit)

PREMIUM SUBSCRIPTION

Rattlewise Premium is available with the following subscription options:

Premium Monthly: $4.99/month Premium Annual: $24.99/year (Save 58%) — includes 7-day free trial

Premium unlocks unlimited saved hunts, the full ranked diagnosis with guided fix checklists, shareable before/after proof reports, multi-session history per vehicle/space, accelerometer structure-borne fusion, and PDF/CSV export.

Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase.

Terms of Service: https://rattlewise.bulpara.com/terms Privacy Policy: https://rattlewise.bulpara.com/privacy

Questions? https://rattlewise.bulpara.com/support