PV Calculator vs PhaseStor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PV Calculator
This tool helps you calculate the necessary components for an off-grid photovoltaic system. It guides you through determining power consumption, available sunlight, and sizing solar arrays and battery banks.
- Battery bank sizing
- Solar panel wattage calculation
- Charge controller sizing
- Power consumption determination
- Sun hours analysis
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The PV Calculator helps you size the battery bank, watts of solar panels and the solar charge controller for your needs. The calculator assumes you will need to size your system to get you through average amount of sun-light for your location. Solar electric system sizing - simple steps: - determine your Power Consumption demands - determine the Sun Hours available per day - size your Array - size your Battery Bank The information and the results provided on this software are not a substitute for professional planning tool! They are for general information purposes only!
PhaseStor
This app focuses on advanced thermal energy storage systems, aiming to reshape energy utilization for a sustainable future. It highlights eco-friendly water heating technology designed to revolutionize sustainable water heating.
- Advanced thermal energy storage
- Eco-friendly water heating systems
- Sustainable energy utilization
- Revolutionary heating technology
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PhaseStor pioneers advanced thermal energy storage systems. Reshaping energy utilization for a more sustainable future. eSTOR is the pinnacle of eco-friendly water heating systems. This cutting-edge technology is designed to revolutionize the way we heat water sustainably.
Screenshots
Verdict
The clearest difference is price: PhaseStor at Free against PV Calculator's $1.99. PhaseStor also leads on rating (5.0 vs 4.0) and update cadence (every 2 weeks vs every 8 months). PV Calculator's advantage is ratings volume (13 vs 1). On ads, in-app purchases, device support and iOS requirement 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
PhaseStor is free to download; PV Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PhaseStor holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: PV Calculator has 13 ratings behind it against 1, so its average is the more settled of the two.
PV Calculator ships an update every 8 months, PhaseStor every 2 weeks. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.
| Parameter | PV Calculator | PhaseStor |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.0 (13 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 13 — better | 1 |
| Update frequency | Every 8 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 15 MB | 99 MB |
| Age rating | 4+ | 4+ |
| Developer | Cristinel Bontas | Phasestor |
Customer experience
PV Calculator
PhaseStor
In-app purchases
PV Calculator
No in-app purchases
PhaseStor
No in-app purchases
Questions
Is PV Calculator free?
Is PhaseStor free?
Which has better reviews, PV Calculator or PhaseStor?
Do PV Calculator or PhaseStor have ads?
Which is updated more often, PV Calculator or PhaseStor?
Other comparisons
