Comparison

PassManager vs Device Battery Manager

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

Head to head
About

PassManager

Features
Read full description

Total Offline Security. The Revolutionary App to Instantly Jot Down and Retrieve Passwords with Zero Internet Risk. Experience lifetime peace of mind with a single, one-time purchase—absolutely no subscriptions or additional costs. Absolutely no internet access required. By physically cutting off connectivity, this app eliminates the risk of data leaks, making it the simplest and safest way to manage passwords. Quickly note them down and retrieve them instantly—never forget a password again. "What was my password for that site?" Eliminate the frequent stress of forgotten passwords and the anxiety surrounding cloud-based security breaches simultaneously with this revolutionary application. [The Ultimate Feature: 100% Offline] This app possesses absolutely NO internet connectivity capability. Your vital password information is encrypted and stored solely on your local device; it is never transmitted to external servers. This is the ultimate security measure against hacking and data leaks. [As Simple as a Memo Pad] We have stripped away complex functions. Launch it "in a flash," just like a familiar paper memo pad, to quickly log IDs and passwords. Search and retrieve them instantly whenever needed. No internet connection, just simple, secure recording. This is the groundbreaking, strictly offline app that specializes in exactly that. Stop worrying about password management today. [CSV Backup & Restore] Easily back up and restore your data to and from a CSV file at any time. Your data format is independent of the app's internal storage format, allowing users full control over their information. [FROM KIWAMI STUDIO] "Question the Norm. Design the Extreme." We build offline-first iOS tools because we believe your data belongs in your hands — nowhere else.

About

Device Battery Manager

This app helps you track battery life for all your household devices. Receive timely notifications before batteries die, ensuring you're always prepared with replacements. Manage battery types, replacement dates, and expected lifespans for every device.

Highlights
  • Track unlimited devices
  • Smart replacement reminders
  • Comprehensive battery database
  • Customizable battery lists
  • Visual status indicators
  • Flexible sorting options
  • Dark mode support
Features
Read full description

Never Forget Another Battery Replacement Device Battery Manager helps you track battery life across all your household devices and electronics. Stop wondering when you last changed the batteries in your smoke detector, TV remote, or wireless mouse. Get timely notifications before batteries die, so you're always prepared. Key Features: • Track Unlimited Devices - Monitor batteries in remote controls, smoke detectors, thermostats, toys, cameras, wireless keyboards, wall clocks, and any battery-powered device in your home • Smart Replacement Reminders - Set custom lifespan expectations for each device and receive notifications when it's time to replace batteries • Comprehensive Battery Database - Choose from over 160 battery types including AA, AAA, CR2032, 9-volt, button cells, camera batteries, hearing aid batteries, and specialized lithium-ion types • Customizable Battery Lists - Select only the battery types you use from common and uncommon categories to keep your picker lists clean and relevant • Visual Status Indicators - See at a glance which devices need attention with color-coded status badges and progress rings showing remaining battery life • Flexible Sorting - Organize your devices by days remaining, device name, or date added to prioritize what needs attention first • Track Important Details - Record device name, battery type, brand, quantity, replacement date, and expected lifespan for complete battery management • Dark Mode Support - Seamlessly adapts to your device's appearance settings for comfortable viewing anytime Perfect For: Homeowners managing smoke detectors and security systems, parents tracking toys and gaming controllers, professionals monitoring camera equipment and wireless peripherals, or anyone tired of dead batteries at inconvenient times. Simple. Smart. Never Be Caught Without Power. Download Device Battery Manager today and take control of every battery in your life.

Screenshots

PassManager4 screens
Device Battery Manager4 screens

Verdict

The call

The clearest difference is price: Device Battery Manager at Free against PassManager's $3.99. Device Battery Manager also leads on update cadence (every 5 days vs fortnightly). On ads, in-app purchases, device support and iOS requirement 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

Device Battery Manager is free to download; PassManager costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PassManager ships an update fortnightly, Device Battery Manager every 5 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 7 level
PassManager versus Device Battery Manager: the parameters behind the verdict, then further details
ParameterPassManagerDevice Battery Manager
Price$3.99Free — better
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone
Requires iOS17.0 — better17.6
Further details — not scored
Size4 MB5 MB
Age rating4+4+
DeveloperKIWAMI STUDIORobert Wood

In-app purchases

None

PassManager

No in-app purchases

None

Device Battery Manager

No in-app purchases

Questions

Is PassManager free?
PassManager costs $3.99, with no in-app purchases.
Is Device Battery Manager free?
Device Battery Manager is free to download, with no in-app purchases.
Do PassManager or Device Battery Manager have ads?
Neither PassManager nor Device Battery Manager shows ads.
Which is updated more often, PassManager or Device Battery Manager?
PassManager ships an update fortnightly, and Device Battery Manager every 5 days. Most recently, PassManager was updated on October 25, 2026 and Device Battery Manager on October 24, 2026.

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