smart vs whatwatt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
smart
Monitor and control your home's energy flow in real-time. View reports, optimize solar energy usage with smart actions, and track historical consumption. MID-certified meters allow for billing in prosumer communities.
- Real-time energy flow monitoring
- Historical energy use reports
- Solar energy optimization tools
- Smart If/Then action setup
- Prosumer community billing
- MID-certified metering
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smart-me puts your energy data on your iPhone and iPad. Whether it's a single-family home, an apartment building with shared solar power (ZEV/vZEV) or a business: see live how much power your solar system produces, how much of it you use yourself and what it costs. LIVE AND TRANSPARENT • Live values from all your smart-me meters and devices • Energy flow between solar system, battery, building and grid • Self-consumption and self-sufficiency rate at a glance • Consumption and costs per apartment, tariff and period – from yesterday to the last 365 days LOAD PROFILES AND HISTORY • Detailed load profiles you can zoom with two fingers • Read the values of individual periods right in the chart • Electricity, heat, hot and cold water in one app FOR OWNERS, PROPERTY MANAGERS AND TENANTS • Ideal for ZEV and vZEV: tenants see their consumption, their solar share and their costs • Clear overview of entire properties with all apartments and meters • Keep an eye on charging stations and e-mobility MADE FOR YOU • Home Screen and Lock Screen widgets with the current power • "Current power" shortcut for Siri and the Shortcuts app • Light and dark mode • Optimized for iPhone and iPad SECURE, FROM SWITZERLAND Your data is stored encrypted in a certified data center in Switzerland. smart-me is the Swiss specialist for smart energy management in buildings. To use the app you need a smart-me account and smart-me devices, such as meters, M-Bus gateways or the Pico charging station. Learn more at web.smart-me.com Customer support Help: https://doc.smart-me.com/home Email: support@smart-me.com
whatwatt
This utility app is preparing for future enhancements. Developers are working on new functionalities that will be revealed soon.
- Future feature groundwork
- Upcoming enhancements
- Developer updates
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The app that allows you to install whatwatt Go on a compatible smart meter, receive smart meter data in real time and connect your smart meter to services. Made for Switzerland.
Screenshots
Verdict
The clearest difference is review sentiment: whatwatt at 100% against smart's 50%. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
smart ships an update monthly, whatwatt every 2 weeks. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | smart | whatwatt |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | smart-me AG | whatwatt AG |
Customer experience
smart
whatwatt
In-app purchases
smart
No in-app purchases
whatwatt
No in-app purchases









