VSP vs SolarZero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VSP
This VoIP softphone connects to the VSP Platform, requiring an administrator-generated account for login. It allows enterprises and operators to manage softphone settings and configurations. Emergency call functionality is limited and not intended for such use.
- VoIP softphone client
- VSP Platform integration
- Administrator account required
- Enterprise provisioning
- Softphone settings management
- Limited emergency call handling
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VSP for iOS is a VoIP softphone explicitly tied to the VSP Platform and requires an administrator generated to account for login. If you do not have an account given to you by your company, operator, or VSP, you will not be able to use the softphone client. The VSP Platform’s Provisioning Module is a powerful way for enterprises and operators to distribute, configure, and manage VSP softphones and enables users to store their softphone related settings a single, convenient location. With the Provisioning Module, customers can fully provision their VSP softphones for use with their enterprise, SMB, ITSP, or operator VoIP solution. IMPORTANT NOTE: This version of VSP is tied to VSP hosted Provisioning Module and requires an account set up by your operator or enterprise. Without an account, the client will not work. Emergency Calls VSP mobile products provide handling designed to redirect emergency calls to the Native Cellular dialer when possible on a best reasonable commercial effort basis, however, this functionality is also dependent on the operating system of the mobile phone which is outside of our control and subject to change at any time. As a result, the official position of VSP is that the VSP product is not intended, designed, or fit for placing, carrying, or supporting Emergency Calls. VSP will not be liable for any costs or damages arising either directly or indirectly from the use of the software for Emergency Calls. Using VSP as a default dialer may interfere with dialing emergency services. To all of our client. As per directive by Apple's policy. We are informing you that our APP does not collect any classified information in your app or device and we respect each individual data privacy.
SolarZero
Monitor and optimize your home's solar energy system with real-time data on energy generation and usage. Track carbon savings, access energy-saving modes, and refer friends to the service.
- Real-time energy generation and usage data
- Energy import/export status updates
- Carbon savings and footprint tracking
- Hot water energy saving mode
- Refer-a-Friend program
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Get visibility of your solar energy system If you’re a SolarZero customer, our new SolarZero App gives you access to a personalised dashboard where you can monitor and optimise your solar energy system, including: • See up-to-date data on how much energy your home is using and generating • Get energy status updates showing how much energy you’re importing and exporting from and to the grid • Track your carbon savings and footprint • Access to your hot water energy saving mode that allows you to save money on your power bill • Refer-a-Friend: Share your unique referral code with your friends and family Note - The SolarZero App is available for solar energy systems installed after November, 2018. If your system was installed prior to this date, it won’t be compatible unless you’ve been upgraded since, and you’ll need to continue using your MySolarZero dashboard for all your monitoring needs. Unsure? No worries. Contact us on 0800 11 66 55 and one of our friendly energy experts will be happy to help.
Screenshots
Verdict
The clearest difference is review sentiment: SolarZero at 36% against VSP's 11%. SolarZero also leads on update cadence (monthly vs every 3 months). VSP's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
VSP ships an update every 3 months, SolarZero monthly. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.
| Parameter | VSP | SolarZero |
|---|---|---|
| Price | Free | Free |
| Rating | 1.2 (18 ratings) — better | — |
| Positive reviews | 11.1% of reviews | 35.7% of reviews — better |
| Number of ratings | 18 — better | — |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 103 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | D T S Limited | solarZero Limited |
Customer experience
VSP
SolarZero
In-app purchases
VSP
No in-app purchases
SolarZero
No in-app purchases









