# Span Installer vs CalaWater

The clearest difference is review sentiment: CalaWater at 100% against Span Installer's 0%. CalaWater also leads on rating (4.8 vs 3.7) and device support (3 vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

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

CalaWater holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 13 and 6 respectively. Written reviews point the same way: 0% of Span Installer's written reviews are positive against 100% of CalaWater's.

Span Installer ships an update fortnightly, CalaWater every 2 weeks. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Span Installer | CalaWater |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (13 ratings)](https://appshunter.io/ios/app/span-installer/id1477128965/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/calawater/id6670616817/reviews)** |
| Number of ratings | **13** | 6 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Monetization | Free | Free |
| Size | 104 MB | 59 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Span.io, Inc](https://appshunter.io/developer/1477128844) | [Cala Systems, Inc.](https://appshunter.io/developer/1736816264) |

## What reviewers say

### Span Installer

[App page](https://appshunter.io/ios/app/span-installer/id1477128965)

This app streamlines the installation and servicing of new and existing SPAN panels. It offers enhanced navigation, an improved breaker labeling process, and integrated troubleshooting support. Users can also confirm communications with battery systems and program setpoints for energy management.

**Highlights:** Faster new SPAN Panel commissioning, Simplified user navigation, Improved breaker labeling, Integrated troubleshooting and support, Confirm hardware communications, Program setpoints with SPAN PowerUp

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Span Installer free?

Span Installer is free to download, with no in-app purchases.

### Is CalaWater free?

CalaWater is free to download, with no in-app purchases.

### Which has better reviews, Span Installer or CalaWater?

CalaWater is rated higher. Span Installer averages 3.7 out of 5 from 13 ratings, while CalaWater averages 4.8 from 6 ratings.

### Do Span Installer or CalaWater have ads?

Neither Span Installer nor CalaWater shows ads.

### Which is updated more often, Span Installer or CalaWater?

Span Installer ships an update fortnightly, and CalaWater every 2 weeks. Most recently, Span Installer was updated on October 15, 2026 and CalaWater on October 7, 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.*