--- title: "Voltage: Volt Ampera Bolt OBD - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Clear SHVCS, and avoid the tow truck when the battery or BECM fails — the most complete diagnostic and control app for the Chevrolet Volt, Opel Ampera (Vauxhall), Chevy Bolt, Opel Ampera-e and Spark E" --- # Voltage: Volt Ampera Bolt OBD — United States > Secured DTCs, battery health ![Voltage App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/ea/dc/3d/eadc3d61-9d7c-4178-9b92-49e412bd5910/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png) **Developer:** [Unknown](https://apptail.io/developer/unknown-wmtEqc) **Category:** Utilities **Rating:** 4.6/5 (9 ratings) **Price:** Free **Bundle ID:** io.tripovan.voltage **Store:** Apple App Store **Country:** United States **Version:** 2.3.2 (released 2026-11-10) **Original Release:** 2026-07-03 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6774315064) **AppTail Page:** [https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/united-states](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/united-states) ## Voltage Description Clear SHVCS, and avoid the tow truck when the battery or BECM fails — the most complete diagnostic and control app for the Chevrolet Volt, Opel Ampera (Vauxhall), Chevy Bolt, Opel Ampera-e and Spark EV. Volt / Ampera: 2011-2019. Bolt / Ampera-e: 2017-2023. Spark EV: 2014-2016. HV UNLOCK — STAY ON THE ROAD A BECM or battery pack failure (P0AFA) can leave the car undrivable and waiting on a dealer. HV Unlock resets the condition so you can keep driving — the difference between getting home and calling a tow truck. The Service High Voltage Charging System (SHVCS) message is a separate problem: the car still drives normally but stops charging. Clear it to get charging working again, including enabling charging on Ampera 2012. This clears the fault condition; it is not a hardware repair. If the cause is still there, the fault can return. BATTERY HEALTH • Usable capacity in Ah, state of health, and degradation tracked over time • All 96 cell voltages live, cell delta, average and minimum cell voltage • Weak Cell active test with guided instructions and a clear verdict • NEW Capacity vs Mileage — how your pack compares with other cars at your mileage • NEW Resistance Index — internal resistance against a typical car of the same model year, flagged normal, elevated or high (supported models) • Six pack temperatures, coolant temp, heater power, conditioning mode • Module programming dates in HW Info — check whether a pack or module was replaced • Compare vehicles side by side; export, import or edit your history BOLT AND AMPERA-E OWNERS The two numbers you actually want, with no manual PID setup: usable capacity in Ah and cell-voltage spread. Track capacity over time instead of guessing from range, and check module programming dates to see whether your pack was replaced. RECENTLY ADDED • Dashboard Skin: switch the cluster between Volt and ELR designs (2016-2018 Volt and Cadillac ELR, separate purchase) • Tire rotation: write new wheel positions without a TPMS programming tool • Charging schedule with weekly departure times, and automatic stop at a chosen EV range • Module restart, oil and fuel life reset, HVAC Afterblow, engine speed control VEHICLE CONTROL Remote start and climate pre-conditioning over Bluetooth for cars before 2019, battery heater for cold-weather range, door and window operation, engine ON / OFF / Release, and remote wake to query modules without powering the car on. PROFESSIONAL DIAGNOSTICS Deep DTC scan across every discovered module, including SW-CAN. Module reset and DTC clearing. 100+ live parameters across 11 charted screens: Efficiency, Powertrain, HV Battery, HV Battery+, Cells, Charger, Charger+, Climate, 12V, 12V Power and TPMS — HV power and current, inverter voltage, MGA and MGB motor temps, transmission fluid temp, engine speed, oil and coolant temps, EGR (Gen 2), charger AC and DC voltage, current and power, HVAC temps and blower, per-module 12V supply for ECM, HPCM1/2, BECM, EBCM, EPS and ASCM, and tire pressure for all four wheels. ADAPTERS Standard ELM327 adapters cover most diagnostics and monitoring. For full functionality — SW-CAN access, HVAC and Infotainment, remote start and door unlock — use a vLinker MC / MC+ / MS or OBDLink MX+. Core diagnostics and monitoring are free. Advanced control, full live monitoring and the dashboard skin are paid upgrades. More info: ## Voltage Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/af/98/76/af98768b-6615-22c9-79ed-57bfaed257a2/voltage-230-main_1290x2796.png/1290x2796.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ed/6b/b5/ed6bb568-127c-f646-5678-f80687827b47/1_appstore.png/1290x2796.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/b3/5b/3f/b35b3fe2-d0a3-7330-bbd1-97fb014b2bf1/shvcs_1290x2796.png/1290x2796.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/cc/64/b4/cc64b48c-0def-2b40-3704-c036591993e3/2_appstore.png/1290x2796.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/0c/f5/6b/0cf56b8c-98cd-ac7c-553e-12da24832c39/4_appstore.png/1290x2796.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/de/66/3c/de663c5c-66a5-6fef-9025-c52fb6c88afd/5_appstore.png/1290x2796.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/2f/41/36/2f4136f8-7ec7-1647-0322-5ca1853ba7c9/7_appstore.png/1290x2796.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/01/4e/aa/014eaabf-e116-ce90-520e-c552930ebf4d/8_appstore.png/1290x2796.png) ## Voltage Rating Breakdown in United States - 5 stars: 8 (89%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 1 (11%) ## Voltage Reviews in United States ### *---- "no trial or free features" everything is locked behind a paywall and nothing useful is made available for free, making it impossible to gauge how useful/effective the paid version of the app could be. -- 100alien, 2026-07-21 [View all Voltage reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Voltage In-App Purchases | Item | Price | |------|-------| | Premium upgrade | $24.99 | ## Apps Similar to Voltage - [8BitDo Ultimate Software](https://apptail.io/app/8bitdo-ultimate-software-pfeb/united-states) - [OBD2 Scanner | OBD Auto Doctor](https://apptail.io/app/obd2-scanner-obd-auto-doctor-kOyb/united-states) - [Dr. Prius / Dr. Hybrid](https://apptail.io/app/dr-prius-dr-hybrid-Nxyc/united-states) - [MyVoltControl](https://apptail.io/app/myvoltcontrol-CeKc/united-states) - [Meshtastic](https://apptail.io/app/meshtastic-iOld/united-states) - [VgateFwUpdater](https://apptail.io/app/vgatefwupdater-wEoh/united-states) - [TopGuru](https://apptail.io/app/topguru-MTnn/united-states) - [TOPDON CarPal](https://apptail.io/app/topdon-carpal-JZgq/united-states) - [Torque Pro : OBD2 Car Scanner](https://apptail.io/app/torque-pro-obd2-car-scanner-bnpq/united-states) - [TopScan VAG](https://apptail.io/app/topscan-vag-Qxiu/united-states) ## Voltage Available In - [United States](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/united-states) - [Ukraine](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/ukraine) - [United Kingdom](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/united-kingdom) - [Spain](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/spain) - [Poland](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/poland) - [Estonia](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/estonia) - [Belarus](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/belarus) - [Finland](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/finland) - [Armenia](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/armenia) - [Hungary](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/hungary) - [Iceland](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/iceland) - [Kazakhstan](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/kazakhstan) - [Luxembourg](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/luxembourg) - [Azerbaijan](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/azerbaijan) - [Canada](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/canada) - [Denmark](https://apptail.io/app/voltage-volt-ampera-bolt-obd-EaHA/denmark) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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