Comparison

DoxSAFE vs Blackout Math.Power Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DoxSAFE

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
Read full description

DoxSAFE: Your Personal Document Scanner & Secure Storage Transform your iPhone and iPad into a powerful document scanner and secure storage vault. DoxSAFE lets you scan, organize, and securely store all your important documents — with on-device AI that names and files them for you, and automatic sync to your own iCloud across iPhone, iPad, and Apple Watch. POWERFUL DOCUMENT SCANNING - Advanced edge detection for perfect document captures - Multi-page scanning with automatic page ordering - Import from Photos, Files, or drag and drop on iPad - Import directly from other apps via the Share Sheet - High-quality PDF generation - Batch scanning for multiple documents AI-POWERED ORGANIZATION - On-device AI reads new documents and suggests a name, category, and expiry date - Auto-renames documents the first time they're analyzed (never overrides a name you set) - Batch re-analyze your whole library in one tap - Smart search finds documents by meaning, not just exact text (AI features require a device that supports Apple Intelligence) SMART ORGANIZATION - Create unlimited custom folders - Tag documents and browse by tag - Smart collections: Expiring Soon, Favorites, Recently Deleted, Large Files, and more - Set expiry dates with reminders you control, from the same day up to 6 months ahead - Quick search to find any document instantly - Sort by name, date, or custom categories SECURITY & PRIVACY - Face ID or Touch ID keeps your entire vault private - Password-protect individual documents for an extra layer of security - All data encrypted and stored locally on your device - iCloud sync uses your own personal Apple account — never our servers - No account, no data collection, no third-party trackers - Share documents securely when you choose to SEAMLESS SYNC, EVERYWHERE - Automatic sync across your iPhone, iPad, and Apple Watch - Works offline - syncs the moment you're back online - Your data stays in YOUR iCloud, never on our servers - Glance at your document count, expiring documents, and favorites right from your wrist - Home Screen widget keeps expiring documents one glance away PASSPORT PHOTO MAKER (Pro) - Capture, auto-crop, and frame passport and visa photos with on-device AI - Supports 2×2 in (USA/India/Mexico), 35×45mm (UK/EU/Australia/Japan), 33×48mm (China), 50×70mm (Canada), and 35×50mm (Malaysia/Pakistan) formats - Print-ready sheets tiled on 4×6, 5×7, A6, A5, or Letter/A4 paper CHOOSE YOUR STYLE Pick the look that suits you: Gold & Emerald, classic Leather, Liquid Glass, or Rainbow Glass. FLEXIBLE PLANS - Free: store up to 5 documents at no cost, forever - Monthly: $0.99/month - Yearly: $9.99/year - save around 16% vs. paying monthly - Lifetime: $19.99 one-time - pay once, own it forever (not a subscription) Pro (Monthly, Yearly, or Lifetime) includes: - Unlimited document scanning and storage - Unlimited folders and tags - AI-powered organization and batch analysis - Passport Photo Maker - Priority support - All future updates included PERFECT FOR Receipts, contracts, insurance policies, medical records, ID cards and licenses, passport/visa photos, bills, personal records, and business documents. LEGACY USER SUPPORT Previous paid version users automatically receive unlimited access at no additional cost - forever! Subscription Details: - Monthly and Yearly are auto-renewing subscriptions; Lifetime is a one-time purchase, not a subscription - Payment is charged to your iTunes Account at confirmation of purchase - Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the current period ends - Manage or cancel anytime in your Account Settings - No refunds for unused portions of a subscription Privacy Policy: https://sites.google.com/view/doxsafe/privacy Terms of Use: https://sites.google.com/view/doxsafe/terms Download DoxSAFE today and take control of your documents!

About

Blackout Math.Power Calculator

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
Read full description

Blackout Math Power Calculator for Real Blackouts When power is unstable, guessing becomes expensive. Wrong battery choices, unrealistic expectations, and incorrect calculations lead to wasted money and failed setups. Blackout Math is not a generic calculator. It is a practical decision-making tool designed for real power outages — helping you understand how long your power will actually last and which battery truly fits your needs. No ideal numbers. No marketing promises. Only realistic calculations for real conditions. Know how long your power will last Configure your battery type, capacity, and voltage — and Blackout Math will: • calculate usable energy in Wh and kWh • account for safe depth of discharge for each battery chemistry • factor in inverter efficiency and real losses • show realistic operating limits No overestimation. No dangerous assumptions. See the real impact of your devices Add any household appliances — lights, routers, laptops, refrigerators, boilers, heaters. Specify power, quantity, and usage time, and the app will instantly: • calculate real energy consumption • show each device’s impact on total load • determine actual runtime — not theoretical values You’ll know exactly when power runs out. Real charging time — not guesses Blackout Math considers battery chemistry and charging limits to provide: • accurate charging time estimates • warnings about unsafe charging currents • charging power based on voltage × amperage • state-of-charge calculations from any starting level No unrealistic “0 to 100%” promises. Complex energy concepts, explained clearly Blackout Math helps you understand: • why usable energy is always lower than nominal • what depth of discharge really means • how inverter efficiency affects runtime • how to choose batteries for real-world usage No engineering background required. Built for clarity and speed Clean inputs, instant calculations, intuitive sliders, and light & dark themes — designed for fast, stress-free decisions when time matters. Perfect for: • planning during blackouts • choosing portable power stations (EcoFlow, Bluetti, Anker) • estimating backup time for apartments and houses • selecting batteries for solar and backup systems • analyzing and optimizing home energy usage Blackout Math is built for real conditions. It helps you avoid costly mistakes and make confident decisions — even under pressure. Less guessing. More certainty. Better energy decisions.

Screenshots

DoxSAFE4 screens
Blackout Math.Power Calculator4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
DoxSAFE versus Blackout Math.Power Calculator: the parameters behind the verdict, then further details
ParameterDoxSAFEBlackout Math.Power Calculator
PriceFreeFree
Rating5.0 (2 ratings) — better3.0 (5 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings25 — better
Update frequencyEvery 8 daysWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.0 — better18
Further details — not scored
Size71 MB10 MB
Age rating4+4+
DeveloperVijay RengaYevheniia Borunova

Customer experience

DoxSAFE

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Blackout Math.Power Calculator

All ratings5 ratings
Positive40.0%
Neutral20.0%
Negative40.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

DoxSAFE

Subscriptions2
  • Monthly Unlimited Access$0.991 Month
  • Yearly Subscription$9.991 Year
One-time1
  • DoxSAFE Pro$19.99
1 purchases

Blackout Math.Power Calculator

One-time1
  • Full Access$7.99

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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