Comparison

Zen Battery vs PSCalendarApp

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

Head to head
About

Zen Battery

This app provides detailed battery information for your iPhone and iPad, including remaining hours for various activities. Customize the visual display with fluid animations and color options. Receive alerts when your device is fully charged.

Highlights
  • Battery life estimation for music, video, calls, and internet
  • Customizable 'Zen' display modes
  • Interactive fluid battery animation
  • Adjustable liquid color and battery design
  • Full charge warning sound
  • Widgets for quick battery status
Features
Read full description

Here you have the definitive battery application for your iPhone and iPad from Shinobit! A quick glance will let you know how many hours you have left for listening to music, watching videos, talking on the phone and surfing the Internet. If you want your battery to be even more "Zen", touching the screen once will hide the icons, leaving only the time and the battery charge percentage on the screen. Touching the screen a second time will only leave the battery. Touching a third time brings back all the data you had at the start. Move the device to see how the fluid moves around inside the battery, tilt it and you will see how it moves from one side to the other. You can change the color of the liquid inside the battery and the battery design that best suits your personality. Once the battery is charged, the application will make a warning sound. A subscription is required to unlock the full features of Zen Battery. Subscription Details: * Monthly Subscription * Annual Subscription with a 3-day free trial. All plans offer all premium features with the flexibility to cancel anytime. - Payment will be charged to your iTunes Account at confirmation of purchase. - Your subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - You can manage your subscriptions and turn off auto-renewal by going to your Account Settings after purchase. The times and percentages are displayed with 5-percent increases. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PSCalendarApp

Features
Read full description

PS Calendar is a simple yet powerful calendar app designed for your everyday planning needs. View your schedule in the way that works best for you — year, month, week, or day. Seamlessly syncs with your existing calendars through Apple's EventKit, so all your events from iCloud, Google, and Exchange appear in one place.

Screenshots

Zen Battery4 screens
PSCalendarApp4 screens

Verdict

The call

The clearest difference is in-app purchases: PSCalendarApp at none against Zen Battery's 3. PSCalendarApp also leads on update cadence (daily vs every 18 months). Zen Battery's advantage is ads (none vs shown). On price, 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

Both are free to download. Zen Battery sells 3 in-app purchases, starting at $1.99 per month. PSCalendarApp asks for nothing beyond the download.

UpkeepUpdate frequency

Zen Battery ships an update every 18 months, PSCalendarApp daily. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Zen Battery versus PSCalendarApp: the parameters behind the verdict, then further details
ParameterZen BatteryPSCalendarApp
PriceFreeFree
Rating4.7 (8.1K ratings) — better—
Positive reviews89.1% of reviews—
Number of ratings8.1K — better—
Update frequencyEvery 18 monthsDaily — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.616.6 — better
Further details — not scored
Size117 MB5 MB
Age rating4+4+
DeveloperShinobit LLCpilsun jang

Bugs and requests

Zen Battery

Reported bugs

2 issues
  • App freezes or crashes
  • Ads break app functionality

Requested features

4 requests
  • 12-hour clock option
  • Battery saver mode
  • Widget support
  • Ability to disable ads

PSCalendarApp

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Zen Battery

Subscriptions2
  • Monthly Subscription3 Days trial$1.991 Month
  • Yearly Subscription3 Days trial$9.991 Year
One-time1
  • Lifetime$19.99
None

PSCalendarApp

No in-app purchases

Questions

Is Zen Battery free?
Zen Battery is free to download, with in-app purchases available.
Is PSCalendarApp free?
PSCalendarApp is free to download, with no in-app purchases.
Do Zen Battery or PSCalendarApp have ads?
PSCalendarApp shows ads; Zen Battery does not.
Which is updated more often, Zen Battery or PSCalendarApp?
Zen Battery ships an update every 18 months, and PSCalendarApp daily. Most recently, Zen Battery was updated on October 23, 2026 and PSCalendarApp on October 24, 2026.

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