PV Calculator. vs WattPreis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PV Calculator.
This tool simplifies solar photovoltaic system design and analysis for professionals and students. It offers a comprehensive Energy Hub with multiple calculators, providing instant results, visual charts, and clear insights for efficient PV system planning and optimization.
- Energy Hub with multiple solar calculators
- Calculate solar panel power output
- Analyze energy generation (daily, monthly, yearly)
- Design solar array size
- Calculate system voltage and configuration
- Instant calculation results
- Visual charts and performance summaries
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PV Calculator is a smart and easy-to-use solar photovoltaic calculation tool designed for solar professionals, engineers, students, and renewable energy planners. The app provides a complete Energy Hub with multiple solar calculators that help you design, analyze, and optimize PV systems efficiently. With clear inputs, visual charts, and instant results, PV Calculator simplifies complex solar calculations into an intuitive experience. Key Modules & Features: Access all essential PV calculators from a single dashboard for quick system planning. Calculate solar panel power output and view performance distribution with clear visual insights. Analyze daily, monthly, and yearly energy generation with easy-to-read charts. Design solar array size based on system parameters, efficiency, and environmental factors. Calculate required system voltage and electrical configuration for PV installations. Highlights: - Instant calculation results - Visual charts and performance summaries - Clean, modern, and easy UI - Accurate solar PV system planning - Ideal for rooftop and small-scale solar projects - Useful for education, planning, and field reference PV Calculator helps you make informed decisions when designing and evaluating solar photovoltaic systems—quickly, accurately, and confidently. in-app purchase included Lifetime to Remove Ads Privacy Policy : https://docs.google.com/document/d/1Dn1gNdDP2AHL7sg-px4rxdLAcoGHlNB8/edit#heading=h.1ionsc3v3xmq Terms and Condition : https://docs.google.com/document/d/1t-LREPKByKaM0UkbIo4o0E1gdAYs21Oe30EfGxenEss/edit?usp=sharing
WattPreis
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WattPreis shows you Austrian electricity spot prices hour by hour — so you know exactly when power is cheap and when to wait. Features: - Hourly price breakdown for today and tomorrow, color-coded by tier - "Next cheap window" — see when the next affordable block starts - Low / Average / Peak summary at a glance - Price alert notifications — get notified when prices drop below your threshold - Morning summary notification with the day's outlook - Home screen widgets for instant price visibility - Dark and light theme Prices are published daily by smartENERGY and reflect Austrian EPEX spot market rates.WattPreis is not affiliated with smartENERGY tho or any electricity provider. The app does not collect any personal data. At all. Questions or feedback? Drop me a line at hey@wattpreis.app
Screenshots
Verdict
The clearest difference is in-app purchases: WattPreis at none against PV Calculator.'s 1. PV Calculator.'s advantage is iOS requirement (13.0 vs 15.1). On price, 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. PV Calculator. sells 1 one-off in-app purchase. WattPreis asks for nothing beyond the download.
| Parameter | PV Calculator. | WattPreis |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 7 months | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 52 MB | 38 MB |
| Age rating | 4+ | 17+ |
| Developer | Nanjibhai Gorasiya | Egor Sazanovich |
In-app purchases
PV Calculator.
- Lifetime premium$9.99
WattPreis
No in-app purchases









