# CalaWater vs Solar Potential Tracker

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.

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

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.

## The numbers

| Metric | CalaWater | Solar Potential Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/calawater/id6670616817/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 4 weeks |
| Monetization | Free | — |
| Size | 59 MB | 67 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cala Systems, Inc.](https://appshunter.io/developer/1736816264) | [Zia Ur Rahman](https://appshunter.io/developer/1529429081) |

## What reviewers say

### CalaWater

[App page](https://appshunter.io/ios/app/calawater/id6670616817)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Solar Potential Tracker

[App page](https://appshunter.io/ios/app/solar-potential-tracker/id6769672233)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*