Version 2.1 • New Sweep Plan turns live chirps, interval evidence, burst groups, and Room Finder readings into a ranked field action plan. • New Chirp Field Guide adds bundled offline reference plates for alarm patterns, room-sweep technique, frequency bands, and source-backed safety notes. • Current screenshots and metadata have been refreshed to show the app in use without stale purchase wording. • Better review notes, updated source-backed documentation, and a new screenshot capture flow for iPhone and iPad.

This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, so every screen reads as a clean column. iPhone is unchanged; still fully on-device.

ChirpHound 2.0 — a pro upgrade for tracking down that chirp, still 100% on-device. • Room Finder: take labelled dB readings room by room and get a ranked, confident verdict on which room the chirp is actually in. • PDF hunt report: export a full report — including the room survey — to share with a landlord or technician. • Insights dashboard: totals, records, urgent count, and a per-source breakdown. Plus the same live narrow-band detection, warmth gauge, haptic "getting warmer" ramp, and spectrogram. No account, no network — every sound is analyzed on your device.

Version 1.1 (build 3) • Beep Guide — a new offline reference tab listing 20 chirp signatures across smoke alarms, CO detectors, appliances, UPS units, smart locks, and leak sensors. Every entry includes the burst count, interval, what the pattern means, and exactly what to do. Sourced from UL 217, UL 2034, NFPA 72, and manufacturer support pages. • Burst Analyzer — ChirpHound now counts the number of rapid beeps per group (burst size). 1 chirp/burst = low battery. 2 chirps/burst = end-of-life (replace the unit). 3 chirps/burst = fault/malfunction. 4 chirps/burst = CO emergency. The burst count is shown in the chirp log and used by the Pattern Decoder. • Smarter Pattern Decoder — the Hunt Detail screen now combines burst-count analysis with interval analysis for a more precise diagnosis. Each result includes an explicit "What to do" action step. Urgency-coded: danger (red border) for CO emergency or water leak, warning (amber) for low-battery and end-of-life, info for appliances. Earlier 1.1 additions (if upgrading from 1.0): • Pattern Decoder for inter-chirp interval analysis. • 5 new presets (520 Hz bedroom alarm, water/flood sensor, Nest Protect, medical pendant, CO high-pitch). • CSV export from History tab.

Version 1.1 • Pattern Decoder — after two or more chirps, the Hunt Detail screen now tells you what the detected interval likely means: low-battery smoke alarm, CO alarm approaching end-of-life, UPS on battery, smart-lock low, appliance chime, and more. Confidence is shown as "likely" or "possibly" with a supporting explanation. • 5 new presets — 520 Hz low-frequency bedroom alarm (NFPA 72 sleeping-area standard; Lifetone/Gentex), water/flood leak sensor, Google Nest Protect low-battery pattern, medical alert pendant, and one additional CO band. Now 15 curated presets. • CSV export — tap the share icon in History to export your complete hunt log as a CSV file compatible with Numbers, Excel, or any spreadsheet. Includes date, preset, band, duration, chirp count, median interval, mean bearing, and your note. • Version number now reads from the app bundle instead of a hardcoded string. • Bug fix: toolbar button on History tab was missing in 1.0.