Comparison

CalaWater vs Solar Potential Tracker

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

Head to head
About

CalaWater

Monitor and control your intelligent heat pump water heater remotely. Track usage, optimize heating schedules for solar production or vacation, and ensure hot water availability. Receive ongoing system updates for improved performance.

Highlights
  • Track hot water usage patterns
  • Sync heating with solar production
  • View energy usage
  • Boost production on demand
  • Schedule vacation energy savings
  • Monitor real-time availability and performance
  • Configure system run times
Features
Read full description

The Cala app is the companion to your Cala intelligent heat pump water heater. It allows you to monitor and control key aspects of your system to ensure it performs according to your household’s needs and preferences. With the app, you can: - Track your home’s hot water usage patterns - Sync your water heater to automatically heat during solar production - View your water heater’s energy usage - Boost production when family or guests are in town - Schedule your vacation for energy savings - Monitor hot water availability and performance in real-time - Configure when the system runs to avoid noise or cool air during specific times The Cala app also enables ongoing system updates and performance improvements delivered over time. An internet connection is required to access the features in the Cala mobile app. While your Cala water heater will function without the app, features like remote control and energy optimizations are only available when the app is connected to the internet No subscription is required. The Cala app is free to use.

About

Solar Potential Tracker

Features
Read full description

Solar Potential Tracker & Calculator Harness the power of the sun with Solar Potential Tracker & Calculator App — your smart companion for analyzing solar energy potential, estimating savings, and planning efficient solar panel installations. Whether you are a homeowner, business owner, solar installer, or renewable energy enthusiast, our app helps you understand your building's solar capabilities with intelligent solar analysis tools and easy-to-use calculators. Key Features Solar Potential Tracker Analyze rooftop solar potential using smart location-based insights and sunlight estimation. Solar Energy Calculator Calculate estimated solar energy production based on: Roof size Sunlight exposure Number of solar panels Panel efficiency Geographic location Savings Estimator Estimate: Monthly electricity savings Yearly energy savings Long-term return on investment (ROI) Payback period for solar installation Roof Solar Analysis Understand how suitable your roof is for solar panel installation with intelligent solar assessment tools. Location-Based Solar Insights Get accurate solar data and energy projections based on your location and sunlight conditions. Solar System Planning Estimate: Recommended system size Required number of solar panels Potential annual energy generation Clean & Easy Dashboard View your solar reports, calculations, and energy estimates in a modern and user-friendly interface. Why Choose Solar Tracker & Calculator? Easy to use Accurate solar estimations Designed for homeowners & businesses Smart energy planning tools Helps reduce electricity costs Supports sustainable living Start your solar journey today and discover how much energy and money you can save with solar power. Download now and explore your solar potential.

Screenshots

CalaWater4 screens
Solar Potential Tracker4 screens

Verdict

The call

The clearest difference is ads: CalaWater at none against Solar Potential Tracker's shown. Solar Potential Tracker's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CalaWater ships an update every 2 weeks, Solar Potential Tracker every 4 weeks. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

Scorecard2 real differences · 8 level
CalaWater versus Solar Potential Tracker: the parameters behind the verdict, then further details
ParameterCalaWaterSolar Potential Tracker
PriceFreeFree
Rating4.8 (6 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 2 weeks — betterEvery 4 weeks
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size59 MB67 MB
Age rating4+4+
DeveloperCala Systems, Inc.Zia Ur Rahman

In-app purchases

None

CalaWater

No in-app purchases

None

Solar Potential Tracker

No in-app purchases

Questions

Is CalaWater free?
CalaWater is free to download, with no in-app purchases.
Is Solar Potential Tracker free?
Solar Potential Tracker is free to download, with no in-app purchases.
Do CalaWater or Solar Potential Tracker have ads?
Solar Potential Tracker shows ads; CalaWater does not.
Which is updated more often, CalaWater or Solar Potential Tracker?
CalaWater ships an update every 2 weeks, and Solar Potential Tracker every 4 weeks. Most recently, CalaWater was updated on October 24, 2026 and Solar Potential Tracker on October 21, 2026.

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