Comparison

Zen Battery vs Smart Event Tracker

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

Smart Event Tracker

Features
Read full description

App to Track your events Such as Birthdays or Anniversaries and be reminded of the upcoming milestones.

Screenshots

Zen Battery4 screens
Smart Event Tracker2 screens

Verdict

The call

The clearest difference is in-app purchases: Smart Event Tracker at none against Zen Battery's 3. On price, update cadence, ads and device support 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. Smart Event Tracker asks for nothing beyond the download.

UpkeepUpdate frequency

Zen Battery ships an update every 18 months, Smart Event Tracker every 19 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 9 level
Zen Battery versus Smart Event Tracker: the parameters behind the verdict, then further details
ParameterZen BatterySmart Event Tracker
PriceFreeFree
Rating4.7 (8.1K ratings) — better—
Positive reviews89.1% of reviews—
Number of ratings8.1K — better—
Update frequencyEvery 18 months — betterEvery 19 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 — better18.2
Further details — not scored
Size117 MB6 MB
Age rating4+4+
DeveloperShinobit LLCPrakash Parupudi

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

Smart Event Tracker

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

Smart Event Tracker

No in-app purchases

Questions

Is Zen Battery free?
Zen Battery is free to download, with in-app purchases available.
Is Smart Event Tracker free?
Smart Event Tracker is free to download, with no in-app purchases.
Do Zen Battery or Smart Event Tracker have ads?
Neither Zen Battery nor Smart Event Tracker shows ads.
Which is updated more often, Zen Battery or Smart Event Tracker?
Zen Battery ships an update every 18 months, and Smart Event Tracker every 19 months. Most recently, Zen Battery was updated on November 6, 2026 and Smart Event Tracker on October 30, 2026.

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