# Voltati vs Sthor

The clearest difference is in-app purchases: Sthor at none against Voltati's 1. Voltati's advantage is ads (none vs shown) and iOS requirement (14.0.0 vs 18.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Voltati sells 1 in-app purchase, starting at $9.99 per year. Sthor asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Voltati against 5.0 for Sthor. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Voltati ships an update monthly, Sthor every 4 weeks. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Voltati | Sthor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/voltati/id6740868992/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sthor/id6751284918/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Subscription | **Ad-supported** |
| Size | 49 MB | 9 MB |
| Requires iOS | **14.0.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Shayar Ghafour](https://appshunter.io/developer/1790857594) | [Anh Cao](https://appshunter.io/developer/1834431228) |

## What reviewers say

### Voltati

[App page](https://appshunter.io/ios/app/voltati/id6740868992)

Monitor your solar energy system to optimize production, track savings, and understand environmental impact. Get daily insights, battery status, and performance analysis to maximize your green energy efforts.

**Highlights:** Daily energy production insights, Weather impact analysis, Battery charging time calculation, Cost and CO2 savings tracking, Performance and efficiency stats, Customizable system settings

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Voltati Yearly Plan | $9.99 | per year |


### Sthor

[App page](https://appshunter.io/ios/app/sthor/id6751284918)

Monitor real-time electricity spot prices and compare plans to optimize energy usage. Features home screen widgets and instant notifications to keep you informed of price changes.

**Highlights:** Real-time electricity spot price monitoring, Electricity plan comparison, Energy usage optimization, Home screen widgets, Instant price change notifications

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Voltati free?

Voltati is free to download, with in-app purchases available.

### Is Sthor free?

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

### Which has better reviews, Voltati or Sthor?

Voltati and Sthor are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Voltati or Sthor have ads?

Sthor shows ads; Voltati does not.

### Which is updated more often, Voltati or Sthor?

Voltati ships an update monthly, and Sthor every 4 weeks. Most recently, Voltati was updated on October 2, 2026 and Sthor on October 9, 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.*