# DoxSAFE vs Blackout Math.Power Calculator

The clearest difference is review sentiment: DoxSAFE at 100% against Blackout Math.Power Calculator's 0%. DoxSAFE also leads on rating (5.0 vs 3.0). Blackout Math.Power Calculator's advantage is monetization model (free vs subscription). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. DoxSAFE sells 3 in-app purchases, starting at $0.99 per month and Blackout Math.Power Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

DoxSAFE holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews point the same way: 100% of DoxSAFE's written reviews are positive against 0% of Blackout Math.Power Calculator's.

DoxSAFE ships an update every 8 days, Blackout Math.Power Calculator weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | DoxSAFE | Blackout Math.Power Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/doxsafe/id6744830264/reviews)** | [3.0 (5 ratings)](https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Subscription | **Free** |
| Size | 71 MB | 10 MB |
| Requires iOS | **17.0** | 18 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vijay Renga](https://appshunter.io/developer/1801860401) | [Yevheniia Borunova](https://appshunter.io/developer/1684316852) |

## What reviewers say

### DoxSAFE

[App page](https://appshunter.io/ios/app/doxsafe/id6744830264)

Transform your device into a powerful document scanner and secure storage vault. Easily scan, organize, and store important documents with automatic iCloud sync. Features military-grade security with local encryption and privacy-focused design.

**Highlights:** Advanced document scanning with edge detection, Multi-page scanning and automatic ordering, Smart organization with custom folders and tags, Expiration date reminders, Military-grade security with Face ID/Touch ID, Seamless iCloud sync across Apple devices, Privacy-first with no data collection

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Unlimited Access | $0.99 | per month |
| Yearly Subscription | $9.99 | per year |
| DoxSAFE Pro | $19.99 | one-time |


### 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 DoxSAFE free?

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

### Is Blackout Math.Power Calculator free?

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

### Which has better reviews, DoxSAFE or Blackout Math.Power Calculator?

DoxSAFE is rated higher. DoxSAFE averages 5.0 out of 5 from 2 ratings, while Blackout Math.Power Calculator averages 3.0 from 5 ratings.

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

Neither DoxSAFE nor Blackout Math.Power Calculator shows ads.

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

DoxSAFE ships an update every 8 days, and Blackout Math.Power Calculator weekly. Most recently, DoxSAFE was updated on October 24, 2026 and Blackout Math.Power Calculator on October 24, 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.*