# DeepVoice vs Blackout Math.Power Calculator

The clearest difference is in-app purchases: DeepVoice at none against Blackout Math.Power Calculator's 1. DeepVoice also leads on iOS requirement (15.0 vs 18). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Blackout Math.Power Calculator sells 1 one-off in-app purchase. DeepVoice asks for nothing beyond the download.

DeepVoice ships an update every 9 days, Blackout Math.Power Calculator weekly. Both last shipped on October 30, 2026.

## The numbers

| Metric | DeepVoice | Blackout Math.Power Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (5 ratings)](https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | — | Free |
| Size | 321 MB | 10 MB |
| Requires iOS | **15.0** | 18 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [深圳市千浪时代技术有限公司](https://appshunter.io/developer/1831687108) | [Yevheniia Borunova](https://appshunter.io/developer/1684316852) |

## What reviewers say

### DeepVoice

[App page](https://appshunter.io/ios/app/deepvoice/id6749671899)

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

**In-app purchases:** none


### Blackout Math.Power Calculator

[App page](https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214)

This app helps you accurately calculate power outage durations and battery performance. It factors in real-world conditions like battery discharge, inverter efficiency, and device consumption to provide realistic estimates for runtime and charging.

**Highlights:** Calculate usable battery energy (Wh/kWh), Factor in safe depth of discharge, Account for inverter efficiency and losses, Calculate real device energy consumption, Estimate actual device runtime, Provide accurate battery charging time estimates, Explain complex energy concepts clearly

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $7.99 | one-time |


## Frequently asked questions

### Is DeepVoice free?

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

### Is Blackout Math.Power Calculator free?

Blackout Math.Power Calculator is free to download, with in-app purchases available.

### Do DeepVoice or Blackout Math.Power Calculator have ads?

Neither DeepVoice nor Blackout Math.Power Calculator shows ads.

### Which is updated more often, DeepVoice or Blackout Math.Power Calculator?

DeepVoice ships an update every 9 days, and Blackout Math.Power Calculator weekly. Most recently, DeepVoice was updated on October 30, 2026 and Blackout Math.Power Calculator on October 30, 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.*