AMP SYSTEMS vs CarHA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AMP SYSTEMS
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This App is only for Sterling Power. Lithium Battery Smart Monitor This app allows you to connect to all of your Lithium Ion batteries. This application is only for Bluetooth lithium batteries. FEATURES * No need for a separate battery monitor…save hundreds of dollars! * Wirelessly connect to each battery from your phone. * Access each BMS independently with multiple batteries. * Track Cycle Life on each battery. * Displays State Of Charge (SOC) percentage with circle graphic. * Display voltage, charging or discharging current, and temperature. * Easy to read gauges. * Battery Events displayed in easy to understand text.
CarHA
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CarHA lets you control your Home Assistant smart home directly from your car's touch screen while driving. Configure buttons for lights, switches, covers, and any Home Assistant entity. Monitor sensors, battery levels, water tanks, and power consumption — all from your car dashboard with large, color-coded buttons designed for driving. FEATURES - Control any Home Assistant switch, light, or automation - Monitor sensors in real time with WebSocket updates - Fully customizable tabs and buttons with colored icons - Supports multiple Home Assistant instances - Geofence zones — get notified or trigger automations automatically when you arrive near home, work, or any location - iOS Widget — check battery and sensor status from your home screen - Backup & Restore — export and import your configuration - Works over local network or remote connection (Tailscale, Nabu Casa) - No cloud, no subscriptions — connects directly to your server REQUIREMENTS - A running Home Assistant instance - Home Assistant URL and Long-Lived Access Token - iPhone with iOS 16+ - A car with a compatible car dashboard system CarHA is not affiliated with Nabu Casa, Inc. or the Home Assistant project.
Screenshots
Verdict
The clearest difference is price: AMP SYSTEMS at Free against CarHA's $4.99. AMP SYSTEMS also leads on iOS requirement (13.0 vs 16.6). CarHA's advantage is update cadence (weekly vs every 3 months) and chart position (#200 vs unranked). On ads, in-app purchases and device support 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
AMP SYSTEMS is free to download; CarHA costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AMP SYSTEMS ships an update every 3 months, CarHA weekly. The most recent releases landed on September 27, 2026 and October 4, 2026 respectively.
| Parameter | AMP SYSTEMS | CarHA |
|---|---|---|
| Price | Free — better | $4.99 |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Best chart rank | — | #200 — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 10 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Sterling Power | Veghes Lucian |
In-app purchases
AMP SYSTEMS
No in-app purchases
CarHA
No in-app purchases
Questions
Is AMP SYSTEMS free?
Is CarHA free?
Do AMP SYSTEMS or CarHA have ads?
Which is updated more often, AMP SYSTEMS or CarHA?
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