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Updated July 2026 · real, multi-region App Store reviews
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Is it worth paying for

Zen Battery

65
Value score / 100 Worth paying? Depends It depends

Zen Battery is a useful, free app for easily monitoring battery status, especially for users who need a larger display, but its value is significantly hampered by intrusive ads and limited advanced features.

Free to download seen up to $24.99 4.7★ lifetime (8,114) since 2011

Zen Battery offers a simple, clear, and often praised graphical display of battery status, which is particularly helpful for users with visual impairments. While the free version is functional, it is plagued by numerous and disruptive ads, leading many users to consider uninstalling it. The app's core functionality is generally well-received, but it lacks advanced features found in other battery apps.

Free vs paid

The free version of Zen Battery provides a large, clear, and colorful display of your battery percentage and charging status R7R8R17R23. It can also indicate when your phone is hot R3 and offers sound notifications R2R23. However, the free experience is heavily impacted by frequent, loud, and sometimes full-screen video ads that many users find annoying and disruptive R183R187R192R204. Some users also report that certain battery designs or animations are locked behind a paywall R2R100R301. While the app description states 'in-app purchases=False', reviews indicate price points up to $24.99 and users asking how to pay to remove ads R193R197R315, suggesting an ad-removal purchase or premium features exist despite the product page information.

Value complaints

  • The app is perceived as a 'money grabbing' scam due to aggressive offers and paywalls for features like battery designs and animations, despite being listed as free with no in-app purchases on the product page.R2R100R186R301
  • Many users are willing to pay to remove the numerous and disruptive ads, indicating that the ad experience in the free version is a significant detractor.R193R197R315

Where it delivers

  • The app provides a clear, large, and visually appealing battery graphic, which is particularly beneficial for users with poor eyesight.R7R8R17R23
  • Many long-term users praise the app for its accuracy, reliability, and consistent performance over several years and across different devices.R1R3R5R11
  • It offers basic but useful information such as charging status, battery percentage, and temperature alerts.R3R8R10R30
Worth paying if

It is worth paying if you highly value a large, clear, and visually appealing battery display and are willing to pay to remove the disruptive ads R8R17. It could also be worthwhile if you appreciate the app's long-term reliability and accuracy reported by many users R1R3R5R11.

Skip / stay free if

Skip this app if you are looking for advanced battery optimization features R19R209R274, a widget R31, or a 12-hour clock option R31R53R60R70. You should also skip it if you are unwilling to tolerate frequent, intrusive ads in the free version R183R187R192R204 and do not wish to pay to remove them.

Evidence note: While the lifetime rating is high, recent reviews are significantly skewed negative, primarily due to an increase in intrusive ads. The product page states 'in-app purchases=False', but multiple reviews mention paywalls for features and the desire to pay to remove ads, indicating a discrepancy between the store listing and user experience regarding monetization.

Frequently asked

Does Zen Battery offer advanced battery optimization features?
No, Zen Battery primarily focuses on displaying battery status and does not offer advanced battery saving or optimization features R19R209R274.
Can I change the clock format in Zen Battery?
Several users have noted that the app only displays a 24-hour clock and there is no setting to change it to a 12-hour format R31R53R60R70.
Are there ads in the free version of Zen Battery?
Yes, the free version of Zen Battery contains numerous and often disruptive ads, including full-screen video ads that many users find annoying and can sometimes break the app R183R187R192R204.
Is Zen Battery accurate?
Many users report that Zen Battery is accurate and reliable in displaying battery information R1R3R5R11, though one user noted a slight discrepancy compared to their iPhone's reported percentage .

What reviewers actually said

Built only from these 120 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.

  1. [R2] 5/5 · US Great: Made good sound and fun bad news I had to pay for the battery design
  2. [R100] 2/5 · US Ok this app is not worth it!: Dam this app is trying to let me say something’s wrong with this app it’s keep onCanceling what am trying to say btw’ the day I found this app it doesn’t have any anamatoins at ALL and all it does is tell you when your device is gonna be charged it doesn’t do anything else but one more thing it does it makes your charger slow so you’ll have to wait 20!!!!!! Hours If i
  3. [R186] 1/5 · US Annoying: It is an annoying and money grabbing app pestering the user with offers that are are hard to turn off or ignore. The authors are trying too hard to make a buck. Uninstalled after a week.
  4. [R301] 2/5 · CA Mid: The app was a little bit bad Cause the skins you couldn’t get the skins they were all pro you should make it so you don’t try to make it easier to guess that this is a cash grab game
  5. [R193] 3/5 · US Fantastic: I needed this app. Where can I pay to get rid of the ads?
  6. [R197] 3/5 · US Delete ads: Unless I can find out how to delete the ads, I will be for deleting the app.
  7. [R315] 3/5 · CA No ads please: Nicest looking battery app but I wish I could pay a couple of bucks to get rid of the lousy, annoying adds.
  8. [R7] 5/5 · US Great battery graphic: Long time app user here. Best one out there. No problem seeing the level on this app.
  9. [R8] 5/5 · US Easy to know my battery status, charging and with a sense of humor.: I love that I can instantly grasp if I need to charge the battery and if it is charging without having to read anything. The colors are cute as is the transparent battery. Way better than other battery apps I’ve tried. Any suggestions? It is fine as it is, but if I were to think of things that would be helpful one would be th
  10. [R17] 5/5 · US Helpful for seniors: It’s hard for me to see the tiny lightning bolt that indicates my phone is charging but with Zen Battery I can see it clearly and watch to make sure the phone continues to charge until full.
  11. [R23] 5/5 · US The best app: I have been using Zen Battery for many years and it has always worked perfectly. It never fails. It’s simple design is all you need for your phones battery. The colors are vibrant and you get to choose which color. Thank you for the update that gives the on and off sounds and the nice big numbers.
  12. [R1] 5/5 · US Competent: Very handy and accurate!
  13. [R3] 5/5 · US Great app: I’ve used them for a long time from iPhones to Google phones to Androids through the years. I love that it can tell me. when my phone is hot. It tells me my charging status and keeps me informed.
  14. [R5] 5/5 · US Long time user: Used app for many years it has worked well for me to monitor my power simple and user friendly
  15. [R11] 5/5 · US Still loving it!: Love love this app. Steady and dependable. Always has been. Thanks so much for having somethimg I can use several times a day and rely on to be accurate.
  16. [R10] 5/5 · US Zen Battery Is The Best: I have been using the Zen Battery App for months now. It works great on my phone, and I like the colors you can choose when you use the app to charge your phone. I would recommend this app to anyone who wants to download this app it works great.
  17. [R30] 5/5 · US Love this app!: Great app. Really lets you know what’s going on with your battery.
  18. [R19] 5/5 · US Billy Bob: Could be better no battery saver in here protect your battery none I don’t care what you do how you try to do it it does not work
  19. [R209] 3/5 · US Battery life: It would help if it could optimize my battery.
  20. [R274] 3/5 · GB Needs to improve: I have other battery apps like the battery doctor which shows 3 stages of the battery being charged unlike this one that just shows that it is just charging. This app requires to show a lot more information to make it worthy of 5 star rating. Look forward to a major update hopefully coming soon......
  21. [R31] 3/5 · US Almost Complete: This app has all the basic info. Needs a setting for a 12-hour clock, instead of only 24-hour clock, and a widget would be appreciated.
  22. [R53] 5/5 · US Question: I love this app. Just a question. Is there a way to change the time not to be in military?
  23. [R60] 4/5 · US Clock: Only thing I don’t like is you can’t change clock from military time to normal time
  24. [R70] 5/5 · US Love the app: I love the app but don’t like the military time.
  25. [R183] 3/5 · US Ads: TOO MANY ADS!!!!
  26. [R187] 3/5 · US Loud: This is a nice app. Problem is that ads come on that are loud and can’t be stopped. Don’t mind ads on a free app but these are disruptive. I had to delete it.
  27. [R192] 1/5 · US Awful: I’ve opened this app twelve times only to be greeted with a video each time! Deleted useless app right away!
  28. [R204] 1/5 · US Too many ads, makes it dysfunctional: It was once a good app. Now there are too many ads. I don’t mean small banner ads. I mean full video ads where I have to watch some crap like gynecological maxi pads for at least 15 seconds before seeing my battery percentage. Also, the full video ads often break the app, so it’s stuck and useless. I’m done with Zen battery app. Do not use.

Synthesized from 120 recent App Store reviews · updated July 2026 · View on the App Store