# SundialEV vs Engine Miles

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.

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.

## The numbers

| Metric | SundialEV | Engine Miles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (13 ratings)](https://appshunter.io/ios/app/sundialev/id6782257870/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/engine-miles-hybrid-tracker/id6819898617/reviews) |
| Number of ratings | **13** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 42 MB | 32 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AppAhead](https://appshunter.io/developer/379575025) | [TooAvid Technologies LLC](https://appshunter.io/developer/6819898619) |

## What reviewers say

### SundialEV

[App page](https://appshunter.io/ios/app/sundialev/id6782257870)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Engine Miles

[App page](https://appshunter.io/ios/app/engine-miles-hybrid-tracker/id6819898617)

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.

**Highlights:** 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)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EngineMiles Pro Monthly | $2.99 | per month |
| EngineMiles Pro Yearly | $19.99 | per year |
| EngineMiles Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is SundialEV free?

SundialEV is free to download, with no in-app purchases.

### Is Engine Miles free?

Engine Miles is free to download, with in-app purchases available.

### Which has better reviews, SundialEV or Engine Miles?

SundialEV and Engine Miles are both rated 5.0 out of 5 on the App Store, from 13 and 1 ratings respectively.

### Do SundialEV or Engine Miles have ads?

Neither SundialEV nor Engine Miles shows ads.

### Which is updated more often, SundialEV or Engine Miles?

SundialEV ships an update every 6 days, and Engine Miles every 3 days. Most recently, SundialEV was updated on November 10, 2026 and Engine Miles on November 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*