Comparison

PV Master vs Solar Calibrator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PV Master

This app helps you harness solar energy by providing accurate solar data, weather integration, and tools to optimize your solar panel setup. It offers comprehensive calculators for energy needs, panel requirements, and battery storage, along with guides and a glossary for informed decisions.

Highlights
  • Accurate solar data based on location
  • Weather data integration
  • Solar potential insights
  • Panel positioning tool
  • Comprehensive energy calculators
  • Guides, FAQs, and glossary
Features
Read full description

Thinking about going solar, or trying to get more out of the panels you already have? PV Master turns confusing solar numbers into clear decisions, so you spend less on power and waste less of the sun. Using just your location, PV Master shows you what your roof can really do, when to rely on your own panels, and when to lean on the grid. Whether you are planning your first system or fine tuning an existing one, you get answers you can act on. What PV Master helps you do: Plan with real numbers, not guesses. Get accurate, location based solar data plus a live grid forecast, so you know the best times to use your own power and when cheaper grid power makes sense. Position your panels for maximum output. The built in compass and tilt tool helps you find the angle that captures the most sun all year long. Size your system with confidence. Simple calculators work out how much energy you need, how many panels and batteries it takes, and what it will cost, so you can weigh the ROI before you spend a cent. Get more from every sunny day. Local weather is built in, so you can see how conditions affect production and plan around them. Learn as you go. Clear guides, FAQs, and a plain language glossary explain every solar and photovoltaic term, so nothing holds you back. It all lives in one friendly app, from first idea to finished install, with information that is genuinely easy to read. Download PV Master today and start making smarter, greener energy decisions. Privacy Policy: https://BigBalli.com/privacy Terms of Use: http://www.apple.com/legal/itunes/appstore/dev/stdeula Payment will be charged to your Apple ID at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off 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 Account Settings on the App Store after purchase. Any unused portion of a free trial is forfeited when purchasing a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://BigBalli.com/privacy

About

Solar Calibrator

This professional toolkit helps PV installers precisely calibrate panel angles, size battery banks and wire gauges, and generate PDF quotes. It includes tools for obstruction analysis and load auditing, all accessible offline.

Highlights
  • Solar compass and tilt angle calibration
  • Battery and inverter sizing
  • Wire gauge calculation
  • Load audit and quote builder
  • PV array and string sizing
  • Obstruction analysis
  • Offline functionality
Features
Read full description

The Professional Solar Installer's Toolkit Solar Calibrator is the all-in-one pocket utility for PV installers, engineers, and advanced DIYers. Calibrate panel angles with precision, size battery banks, calculate wire gauges, and generate professional PDF quotes—all without internet access. CORE TOOLS: Solar Compass & Tilt: Align panels to True North/South and find the optimal tilt angle for Summer or Winter efficiency. Uses advanced sensor damping for steady, professional readings. Battery & Inverter Sizing: Calculate exact off-grid storage needs based on load. Supports Lithium (LiFePO4) and Lead-Acid profiles. Wire Gauge Calculator: Prevent voltage drop and fire hazards. Calculates safe wire thickness (AWG/mm²) based on voltage, current, and run length. Load Audit & Quote Builder: Build a complete appliance load profile and generate instant PDF estimates to share with clients. PV Array & String Sizing: Determine the maximum number of panels per string based on local temperature lows (Voc limits) to protect your inverter. Obstruction Analysis: Calculate shadow cast distance to ensure your array stays shade-free during winter solstice. NEW IN V2.0: Field Mode UI: High-contrast Dark Mode for visibility in bright sunlight. PDF Reports: Export detailed calculation reports and client quotes. Smart Location: Auto-detects latitude for precise sun-hour estimations.

Screenshots

PV Master4 screens
Solar Calibrator4 screens

Verdict

The call

The clearest difference is review sentiment: Solar Calibrator at 100% against PV Master's 17%. Solar Calibrator also leads on rating (5.0 vs 4.3) and in-app purchases (none vs 4). PV Master's advantage is price (Free vs $9.99) and update cadence (every 8 days vs every 11 months). On 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

CostPrice · In-app purchases · Ads · Monetization

PV Master is free to download; Solar Calibrator costs $9.99 up front. PV Master sells 4 in-app purchases, starting at $4.99 per month. Solar Calibrator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Solar Calibrator holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: PV Master has 23 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 17% of PV Master's written reviews are positive against 100% of Solar Calibrator's.

UpkeepUpdate frequency

PV Master ships an update every 8 days, Solar Calibrator every 11 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard8 real differences · 2 level
PV Master versus Solar Calibrator: the parameters behind the verdict, then further details
ParameterPV MasterSolar Calibrator
PriceFree — better$9.99
Rating4.3 (23 ratings)5.0 (2 ratings) — better
Positive reviews17.1% of reviews100.0% of reviews — better
Number of ratings23 — better2
Update frequencyEvery 8 days — betterEvery 11 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size25 MB39 MB
Age rating4+4+
DeveloperBigBalli Consulting llcFawzi Fakhro

Customer experience

PV Master

All ratings23 ratings
Positive87.0%
Neutral0.0%
Negative13.0%
Written reviews35 reviews
Positive17.1%
Neutral11.4%
Negative71.4%

Solar Calibrator

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

PV Master

Subscriptions2
  • Full Unlock$4.991 Month
  • Yearly$49.991 Year
One-time2
  • Location Solar Panel Data$0.99
  • Lifetime$59.99
None

Solar Calibrator

No in-app purchases

Questions

Is PV Master free?
PV Master is free to download, with in-app purchases available.
Is Solar Calibrator free?
Solar Calibrator costs $9.99, with no in-app purchases.
Which has better reviews, PV Master or Solar Calibrator?
Solar Calibrator is rated higher. PV Master averages 4.3 out of 5 from 23 ratings, while Solar Calibrator averages 5.0 from 2 ratings.
Do PV Master or Solar Calibrator have ads?
Neither PV Master nor Solar Calibrator shows ads.
Which is updated more often, PV Master or Solar Calibrator?
PV Master ships an update every 8 days, and Solar Calibrator every 11 months. Most recently, PV Master was updated on November 1, 2026 and Solar Calibrator on November 3, 2026.

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