Compagnon Pro vs Voltage
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Compagnon Pro
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Compagnon – The field app for connected real estate agents Compagnon is the mobile application that simplifies the daily work of real estate professionals. Note-taking, property estimates, visits, visit reports, client updates... everything is done from your phone, in just a few clicks. No more paper, duplicates, or repetitive tasks. Designed for field work, the app assists you during appointments, organizes your data, and shares it directly with Papiris (real estate agent CRM). Estimates: never lose any information During property estimates, agents can: - Fill in up to 600 standardized criteria per property - Scan documents on-site - Add photos directly from the field - Automatically organize and synchronize all data into Papiris Collected information is clear, complete, and ready to use. No more scattered notes or forgotten details. Visits: everything ready, everything recorded During your visits with a potential buyer: - Access all key property information with a single click - Get the visit report signed on a mobile device or tablet - Update the client record automatically in Papiris You work faster, clearer, and more professionally. No need for paper or manual data entry: everything is already done. Real-time collaboration Compagnon makes team collaboration easy: - Property and client records are enriched by the whole team - Each document or photo added is visible to authorized colleagues - Visit feedback, estimate notes, and shared documents are centralized Agents, salespeople, and administrative staff all work with the same information, at the right time. A tool built for the field - Fast, clear interface, usable on the go - Intuitive note-taking and photo capture - Centralized client follow-up, documents, and visit reports - Compatible with smartphones and tablets - Automatic and secure synchronization Why your agency needs Compagnon - Fewer manual tasks, more time in the field - Reliable, complete, shared data - Time saved on every estimate and visit - Better fluidity between team members - Clearer and more responsive client relationships - Stronger coordination between the field, back office, and CRM Compagnon turns every appointment into value for your agency. One single tool to work better, faster, together.
Voltage
This app provides comprehensive diagnostic and control features for specific GM electric and hybrid vehicles. It allows users to monitor various vehicle parameters, perform deep diagnostics, and even control certain functions remotely via an OBD2 adapter.
- Deep DTC scanning
- Live parameter monitoring
- Real-time battery analysis
- HV Unlock function
- Remote start and climate control
- Charge management and scheduling
- Module reset and clearing
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The most comprehensive diagnostic and control app for Chevrolet Volt / Opel Ampera / Vauxhall Ampera / Holden Volt. Chevy Bolt and Opel Ampera-E are currently supported from 2017 to 2023. Connect via a supported ELM327 Bluetooth LE or Wi-Fi OBD2 adapter and take full command of your vehicle. RECOMMENDED ADAPTERS For full compatibility — SW-CAN access, HVAC and Infotainment communication, remote start, and door unlock — use an OBDLink MX+ or vLinker MS. Bluetooth LE and Wi-Fi adapters provide limited compatibility. ENHANCED VEHICLE CONTROL • Remote start (pre-conditioning) and climate control within Bluetooth range for vehicles before 2019 • Battery heater for improved cold-weather range • Charge management and scheduling • Remote door and window operation • Engine control with ON / OFF / Release support • Wake the car remotely to query modules without powering it on • Module reset and DTC clearing HV UNLOCK FUNCTION "Unbrick" your car and stay on the road with the HV Unlock function. Enable charging on Ampera 2012 by resetting the Service High Voltage Charging System. PROFESSIONAL DIAGNOSTICS • Deep DTC scan across all discovered modules, including SW-CAN network access • 100+ live parameters with two-column monitoring mode • Real-time battery pack analysis: cell voltages, temperatures, BECM voltage & current • Weak Cell active test with guided instructions and a clear verdict • Battery Coolant Pump and heater control with feedback values and charts • HW Info with module programming dates and ECM calibrations MONITORING PARAMETERS Nine dedicated screens, every value charted in real time: • Efficiency — State of Charge (displayed & raw), EV range, kWh used, EV efficiency, fuel efficiency (hybrid) • Powertrain — HV power, HV current, HV inverter voltage, transmission fluid temp, MGA & MGB motor temps, aux transmission pump speed, gear shifter position. For hybrids it also reports engine speed, engine oil & coolant temps, EGR commanded (Gen 2), EGR cooler temps (Gen 2), and HPCM engine-startup reason. • HV Battery — Pack voltage, internal resistance, cell delta, average and minimum cell voltage, six individual battery temps, battery coolant temp & speed, battery heater power, battery conditioning mode, outside/inside temps, and the last five charging-session histories. • Charger — Charger state, charging level, AC input voltage/current/power, DC output voltage/current/power, charging-system status, and (2016+) AC & DC duty cycles. • Charger Plus — Extended charger diagnostics, including duty-cycle on 2016+ vehicles. • Climate — HVAC target temp, windshield temp, cabin heat power, AC power, AC speed, blower speed, HVAC coolant temp (2016+), outside & inside temps, and remote-start counters. • 12V — 12V voltage, current, power, state of charge, charging state, maintenance mode. • 12V Power (per-module) — Individual 12V supply voltage reported by every major control module: ECM, HPCM1, MGA, MGB, HPCM2, BECM, EBCM, Brake Booster, EPS, ASCM, HVAC and Radio. Power-electronics coolant temp and pump speed included. • TPMS — Live tire pressure for all four wheels. VEHICLE HISTORY & DATA MANAGEMENT • Full history view with vehicle selection and deletion • Export, import, and edit your vehicle history with the built-in editor HEALTH INSIGHTS Critical vehicle health analysis and maintenance recommendations — ideal for DIY enthusiasts, used car buyers checking battery health, and owners tracking long-term performance. POLISHED EXPERIENCE Modern UI with Dark / Light / System theme support, a bottom status bar for at-a-glance status, and full multi-language support.
Screenshots
Verdict
The clearest difference is in-app purchases: Compagnon Pro at none against Voltage's 5. Compagnon Pro also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18.2). On price, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Voltage sells 5 one-off in-app purchases. Compagnon Pro asks for nothing beyond the download.
Compagnon Pro ships an update weekly, Voltage every 5 days. The most recent releases landed on October 1, 2026 and October 24, 2026 respectively.
| Parameter | Compagnon Pro | Voltage |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (8 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Weekly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.2 |
| Further details — not scored | ||
| Size | 46 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Ideeri | Oleksandr Radchenko |
In-app purchases
Compagnon Pro
No in-app purchases
Voltage
- ELR / Volt Design activation$4.99
- ELR / Volt Design activation$9.99
- Traffic Signs Activation (discount)$9.99
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- Traffic Signs Activation$19.99
- Premium upgrade$24.99









