Watt Advisor vs MillBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Watt Advisor
This app analyzes your energy usage to provide personalized advice on solar installation, energy plans, and home efficiency. It also monitors grid conditions and sends alerts for potential reliability issues. Optimize your energy consumption and save money with smart recommendations.
- Energy usage analysis
- Solar calculator
- Grid reliability alerts
- Energy contract analysis
- Home energy efficiency assessment
- Smart device optimization
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Watt Advisor is here to guide you through the energy transition. The way we produce and consume energy is changing, and this presents new choices for consumers. Should I install rooftop solar? Do I have the best energy plan? Is my home energy efficient? Watt Advisor connects to your usage data and helps answer all these questions. Worried if the grid will have enough capacity during the next heat wave or winter storm? We monitor current and future grid conditions (supply and demand) and send you push alerts as soon as we see any issues with grid reliability. Enter your current energy contract information and we estimate your bill, inform you if you are paying too much for your energy, and send push alerts to remind you when its time to renew your contract. Our solar calculator will tell you the optimal solar system size based on your usage (and if solar even makes sense for you) so you can maximize the economic value of going green through rooftop solar. Watt Advisor algorithms analyze your usage, and additional information about your home to calculate how efficient your home energy usage is and if you should consider a home energy audit. Our app can also integrate with your smart devices (Thermostats, Electric Vehicles - coming soon) and we optimize their usage based on how much renewable energy is on the grid and reduce usage when grid reliability is threatened. We also provides advice on the best time to run your high power devices such as washers and dryers. Our service is provided for free and we currently serve all customers in competitive areas of ERCOT in Texas (ONCOR, AEP, TNMP, CENTERPOINT) whoever your retail electric provider is. We have a vision of a renewable and reliable power grid and can't wait to help you make decisions that will support that goal. Energy can be cheaper greener and more reliable with Watt Advisor!
MillBook
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MillBook is a simple offline ledger for rice mill owners and operators. Track daily paddy intake, rice production, stock movements, sales and payments in one place. Add production records, calculate rice output, monitor paddy, rice, bran, husk and broken rice stock, and see who has paid or who still has a pending balance. Designed for small mills that need a fast and practical record book without complicated software. Key features: • Add rice production records • Track paddy input and rice output • Monitor stock for rice, paddy, bran, husk and broken rice • Record sales and payment status • See paid, pending and partial payments • View monthly production and sales reports • Works offline • Records are stored on your device MillBook helps you replace messy notebooks and spreadsheets with a simple digital mill ledger. Subscriptions MillBook Pro is available as an auto-renewable subscription: • Monthly — $0.99 per month (3-day free trial) • Yearly — $4.99 per year A one-time Lifetime purchase is also available for $9.99. Prices shown are for the U.S. store; local pricing applies in other regions. Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your App Store account settings after purchase. Privacy Policy: https://halitaldemir24.github.io/millbook-privacy/ Terms of Use: https://halitaldemir24.github.io/millbook-privacy/terms.html
Screenshots
Verdict
The clearest difference is in-app purchases: Watt Advisor at none against MillBook's 6. Watt Advisor also leads on iOS requirement (13.4 vs 15.0). On price, update cadence, 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. MillBook sells 6 in-app purchases, starting at $1.99 per month. Watt Advisor asks for nothing beyond the download.
Watt Advisor ships an update every 6 weeks, MillBook monthly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Watt Advisor | MillBook |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.4 — better | 15.0 |
| Further details — not scored | ||
| Size | 34 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | BreakSmart LLC | halit aldemir |
In-app purchases
Watt Advisor
No in-app purchases
MillBook
- MillBook Pro (Monthly)$1.991 Month
- MillBook Pro (Monthly)$2.991 Month
- MillBook Pro (Yearly)$19.991 Year
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- MillBook Pro (Yearly)$29.991 Year
- MillBook Pro (Lifetime)$29.99
- MillBook Pro (Lifetime)$49.99









