# EMA App vs Tesla One

The clearest difference is rating: Tesla One at 3.0 against EMA App's 2.5. Tesla One also leads on update cadence (every 6 days vs every 2 weeks). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Tesla One holds the better App Store score, 3.0 against 2.5. Both are backed by a comparable volume of ratings — 112 and 308 respectively. Written reviews complicate that: 26% of EMA App's written reviews are positive against 21% of Tesla One's, so the app with the better star average is not the one people write more warmly about.

EMA App ships an update every 2 weeks, Tesla One every 6 days. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | EMA App | Tesla One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (112 ratings)](https://appshunter.io/ios/app/ema-app/id984843541/reviews) | **[3.0 (308 ratings)](https://appshunter.io/ios/app/tesla-one/id1625770308/reviews)** |
| Number of ratings | 112 | **308** |
| Positive reviews | **26.4% of reviews** | 21.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Monetization | Free | Free |
| Size | 259 MB | 289 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Altenergy Power System,Inc.](https://appshunter.io/developer/906598006) | [Tesla, Inc.](https://appshunter.io/developer/582007916) |

## What reviewers say

### EMA App

[App page](https://appshunter.io/ios/app/ema-app/id984843541)

Monitor your solar energy system's performance in real-time and review historical data. Track power output, environmental benefits, and system details for APsystems microinverter users.

**Highlights:** Real-time output power display, Historical power output tracking, Environmental benefits monitoring, Daily, monthly, yearly, and lifetime output review, System registration and equipment profile, Installer contact information

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

**In-app purchases:** none

**What reviewers like**

- ✅ Accurate solar panel energy production tracking
- 📊 Clear and easy-to-understand data visualization
- 🌍 CO2 reduction metrics display
- ⚡ Reliable hardware performance
- 📱 Basic functionality works when operational

**What reviewers complain about**

- 🐛 Frequent app crashes and freezes
- 🔌 Unreliable connectivity and offline issues
- ⏰ Data consistently 10-15 minutes to hours behind real-time
- 🌙 Night mode/dark mode won't persist after closing app
- ⚙️ Settings not retained between sessions

**Reported bugs**

- App won't open on iPad after recent updates
- Night/dark mode doesn't persist when app is closed
- Login screen infinite loading circle
- App crashes regularly and becomes unusable
- Data page requires manual selection every time to display information

**Requested features**

- iOS widgets for home screen and lock screen
- Apple Watch app and watch face widgets
- iPad app with landscape mode support
- Auto-refresh functionality for live data updates
- Persistent login credentials


### Tesla One

[App page](https://appshunter.io/ios/app/tesla-one/id1625770308)

This app helps Tesla employees and partners manage daily operations, including customer education and support. It's also used by certified installers and electricians for preparing, installing, and commissioning Tesla products.

**Highlights:** Manage daily operations, Customer education, Customer support, Prepare installations, Install and commission products

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

**In-app purchases:** none

**What reviewers like**

- ✅ Seamless commissioning experience for wall connectors
- 👍 User-friendly interface once login method is understood
- 🎓 Excellent installer training videos and educational content
- 🔧 Ability to manage WiFi settings and device configuration
- ⚡ Works flawlessly on Android devices

**What reviewers complain about**

- 🐛 Frequent app freezing and crashes
- ❌ Non-functional for regular consumers/homeowners
- 🔐 Confusing login process and unclear authentication requirements
- 📱 Significant iOS/iPhone compatibility issues
- ⚠️ Removed web interface forcing mandatory app usage

**Reported bugs**

- App freezes on Face ID authentication screen
- Crashes when scanning QR codes or barcodes
- Unable to access jobs/equipment on install screen (iPhone)
- App fails to connect to Powerwalls and wall connectors
- Barcode scanning functionality unreliable

**Requested features**

- Restore web interface for direct IP address access
- Offline mode for clocking in/out without WiFi
- Remove location permission requirement for time punch
- Simplify login process with clearer instructions
- Add troubleshooting video content


## Frequently asked questions

### Is EMA App free?

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

### Is Tesla One free?

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

### Which has better reviews, EMA App or Tesla One?

Tesla One is rated higher. EMA App averages 2.5 out of 5 from 112 ratings, while Tesla One averages 3.0 from 308 ratings.

### Do EMA App or Tesla One have ads?

Neither EMA App nor Tesla One shows ads.

### Which is updated more often, EMA App or Tesla One?

EMA App ships an update every 2 weeks, and Tesla One every 6 days. Most recently, EMA App was updated on October 20, 2026 and Tesla One on October 21, 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.*