# SolarVOLT vs callnow.me

The clearest difference is update cadence: callnow.me at every 10 days against SolarVOLT's monthly. SolarVOLT's advantage is iOS requirement (13.4 vs 18.0). On price, ads, 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.

SolarVOLT ships an update monthly, callnow.me every 10 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SolarVOLT | callnow.me |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (30 ratings)](https://appshunter.io/ios/app/solarvolt/id6747215783/reviews)** | — |
| Number of ratings | **30** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free | — |
| Size | 42 MB | 45 MB |
| Requires iOS | **13.4** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [AsianPowerDevicesInc](https://appshunter.io/developer/1214788661) | [ESIMONE PTE. LTD.](https://appshunter.io/developer/1759921194) |

## What reviewers say

### SolarVOLT

[App page](https://appshunter.io/ios/app/solarvolt/id6747215783)

Monitor your inverter's performance and log its data. This application also allows for inverter configuration, providing a comprehensive tool for managing your solar power system.

**Highlights:** Monitor inverter data, Log inverter data, Inverter configuration, Solar power system management

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

**In-app purchases:** none


### callnow.me

[App page](https://appshunter.io/ios/app/callnowme/id6803756442)

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

**In-app purchases:** none


## Frequently asked questions

### Is SolarVOLT free?

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

### Is callnow.me free?

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

### Do SolarVOLT or callnow.me have ads?

Neither SolarVOLT nor callnow.me shows ads.

### Which is updated more often, SolarVOLT or callnow.me?

SolarVOLT ships an update monthly, and callnow.me every 10 days. Most recently, SolarVOLT was updated on November 5, 2026 and callnow.me on October 31, 2026.

---

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