Evidence over theater
Every conclusion links back to available live readings, stored frames, adapter evidence, or an explicit rule.
Join TestFlight Evidence-first vehicle intelligence
Know what the
car knows.
ScanWrench turns the adapter you already own into a disciplined diagnostic workflow—across everyday cars, hybrids, and supported EV systems.
Built for iPhone · No proprietary ScanWrench adapter required
EVIDENCE MODEL
2017 HYBRID · CAN 11/500PRIMARY FINDINGP0A80
Hybrid battery deterioration evidence
A high-confidence finding requires the code and repeatable module imbalance under comparable load.
Illustrative confidenceEXAMPLE
CORROBORATING SIGNALS
Δ
Block voltage spread1.42 V · outlier detected
↯
Load responseRepeatable under acceleration
✓
Evidence coverageCode · blocks · load response
OBSERVED FACTLIKELY CAUSEUNKNOWN / NOT AVAILABLE
01 / THE DIFFERENCEA scan tool should
VERIFIED HONEST PORTABLE
A scan tool should
show its work.
Most apps give you a code, a generic paragraph, and a reason to keep guessing. ScanWrench records what the vehicle actually reported, what supports the finding, and what could not be verified.
Unknown means unknown
If a module, PID, or adapter cannot provide the data, ScanWrench says so. No fake precision.
Your adapter, your data
Open compatibility across supported BLE and Wi-Fi hardware, with local scan history you control.
One pass.
A complete record.
Designed like a technician’s investigation, not a dashboard full of disconnected gauges.
Connect
ScanWrench identifies the transport, adapter family, and protocol before making a claim.
Interrogate
It checks stored and pending codes, freeze frames, supported live sensors, and available traction-battery signals.
Corroborate
The scan keeps codes, freeze-frame conditions, and a live-data snapshot together instead of turning one PID into a verdict.
Package
Save a time-stamped evidence record that separates observed facts, likely causes, and unknowns.
03 / OPEN ADAPTER ECOSYSTEMBring the adapter
Bring the adapter
you already own.
ScanWrench chooses the best available transport and tells you exactly what your phone, adapter, and vehicle can support.
SELECTED TRANSPORT
Bluetooth Low Energy
Direct pairing inside ScanWrench. Supports quality BLE adapters such as OBDLink CX, vLinker BLE+, and compatible ELM327-style BLE hardware.
- ✓No Settings pairing
- ✓Fast reconnect
- ✓Broad iPhone support
Compatibility promise: ScanWrench identifies limits before a scan and marks unavailable evidence as incomplete. Vehicle-specific enhanced data still depends on the car, adapter, and licensed protocol access.
Universal OBD-II
Stored and pending codes, freeze-frame evidence, supported PID discovery, adapter and protocol identity, and live data.
Hybrid + EV aware
Battery and powertrain views appear only when the vehicle and adapter expose trustworthy data.
Battery evidence
12V trends and supported traction-battery signals—without inventing state-of-health from thin data.
Private by design
Scan history stays local by default. Share an evidence package only when you choose.
PRIVATE BETAYour next scan should
Your next scan should
settle the question.
Help shape the diagnostic tool we always wanted in the glovebox.
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