SundialEV vs Engine Miles
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SundialEV
This app intelligently directs surplus solar energy to charge your electric vehicle instead of sending it back to the grid. It helps users save money by avoiding high electricity buy-back rates and utilizing cheaper off-peak charging times. The system is designed for a set-and-forget experience, integrating with existing EV and solar hardware.
- Charges EV with surplus solar
- Avoids grid export for low rates
- Set charging floor and battery reserve
- Works with all Tesla models
- Coordinates with Powerwall
- Utilizes off-peak charging
Read full descriptionHide full description
Your rooftop solar is worth far more in your car than sold back to the grid. SundialEV automatically charges your EV from surplus solar instead of exporting it for pennies — set it once and forget it. Under "Net billing" electric plans (like NEM 3.0), utilities pay you a few cents for the solar you export, then charge you full price for the same energy at night. Sundial closes that gap: when your panels make more than your home needs, it sends the surplus to your car instead of the grid, saving most users on their electricity bills. • Set-and-forget — pick a charging floor and a battery reserve once; Sundial does the rest • Works with every Tesla model — and with any EV brand via an OCPP smart wall charger, like the Wallbox Pulsar Plus • Reads your production from Tesla, SolarEdge, Enphase solar systems (+ more now) • Coordinates with your Powerwall — you choose how full it gets before the car charges • Tops up on cheap off-peak power on your schedule, and avoids peak-rate windows when solar isn't available • Need range right now? One tap starts a full-speed charge — solar takes back over when it's done • No new hardware — works with the solar, battery, car, and charger you already own
Engine Miles
This app helps hybrid and plug-in hybrid vehicle owners track their gasoline engine mileage. It logs fuel fill-ups and estimates engine usage for maintenance reminders. Pro features offer advanced insights, multiple vehicle support, and data export.
- Estimate gasoline engine mileage
- Log fuel fill-ups
- Oil change reminders
- Track multiple vehicles (Pro)
- Fuel use and cost insights (Pro)
- Gas vs. electric mileage split (Pro)
- CSV import/export (Pro)
Read full descriptionHide full description
Your odometer shows how far your car has gone. Engine Miles helps you estimate how far its gasoline engine has gone. Built for hybrid and plug-in hybrid (PHEV) drivers, Engine Miles uses the fuel you log and your vehicle's gas-mode fuel economy to estimate engine mileage. Keep your fill-ups in one clear log and follow an oil-change goal based on estimated engine miles. START FREE Track one vehicle, log unlimited manual fill-ups, edit your history, and see your estimated engine-mile total. Log oil changes and follow your next oil-change estimate. GO FURTHER WITH ENGINE MILES PRO Add multiple vehicles, explore fuel use and costs in Insights, and look back with a year recap. For plug-in hybrids, see the estimated gas-versus-electric mileage split. Pro also includes CSV import and export, a full backup, Home Screen and Lock Screen widgets, and notification reminders. Choose a monthly or yearly subscription, or a lifetime purchase, to unlock Pro. No account is required. Your vehicle log stays on your iPhone. Usage sharing helps improve the app and can be turned off in Settings > Privacy. Engine mileage and electric mileage are estimates based on the information you enter. Regular hybrids do not show an electric-mileage split. Follow your vehicle manufacturer's maintenance recommendations; the oil-change estimate is a guide, not maintenance advice. Pro subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel them in your Apple Account settings. Lifetime is a one-time purchase. Terms of Use: https://enginemiles.com/terms Privacy Policy: https://enginemiles.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: SundialEV at none against Engine Miles's 3. SundialEV also leads on ratings volume (13 vs 1). Engine Miles's advantage is update cadence (every 3 days vs every 6 days). On price, rating, ads 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
Both are free to download. Engine Miles sells 3 in-app purchases, starting at $2.99 per month. SundialEV asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for SundialEV against 5.0 for Engine Miles. That said, the two scores are not equally well evidenced: SundialEV has 13 ratings behind it against 1, so its average is the more settled of the two.
SundialEV ships an update every 6 days, Engine Miles every 3 days. Both last shipped on November 10, 2026.
| Parameter | SundialEV | Engine Miles |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (13 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 13 — better | 1 |
| Update frequency | Every 6 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 42 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | AppAhead | TooAvid Technologies LLC |
In-app purchases
SundialEV
No in-app purchases
Engine Miles
- EngineMiles Pro Monthly$2.991 Month
- EngineMiles Pro Yearly$19.991 Year
- EngineMiles Pro Lifetime$29.99









