Verithiathe honest score on any app
Updated July 2026 · real, multi-region App Store reviews
The verdict on

Zen Battery

65
User verdict / 100 High confidence Divided

Zen Battery is a simple, visually appealing battery monitoring app that many long-term users find reliable and easy to read, but recent reviews highlight significant issues with intrusive ads and a lack of advanced features.

4.7★ lifetime (8,113) Free to download since 2011 by SHINOBIT LLC updated 10.3 mo ago recent negative 7% 120 reviews across 4 regions
Ad Intrusiveness Readability & Display Lack of Features Reliability & Accuracy
5★267
4★51
3★17
2★8
1★18
recent reviews across 4 regions, vs the 4.7★ lifetime average

Zen Battery provides a clear, large graphic display of battery percentage and charging status, which many users appreciate for its simplicity and readability. However, recent feedback frequently mentions an overwhelming number of disruptive ads, a lack of advanced functionality, and some inaccuracies or missing features.

What users like

  • Provides a clear, large, and easy-to-read battery display, especially helpful for users with impaired vision.R17R28R37R42
  • Many long-term users find the app reliable and accurate for monitoring battery status and charging.R1R3R5R11
  • Offers customizable colors and appealing graphics for the battery display.R2R8R10R15

What users complain about

  • Contains an excessive number of loud and disruptive video ads, which often break the app or make it unusable.R100R183R186R187
  • Lacks advanced battery information, optimization features, or widgets, offering little beyond what the device's native display provides.R16R19R74R158
  • The app's clock is stuck in 24-hour (military) format with no option to change to 12-hour time.R31R212R53R60
  • Some users report the battery percentage displayed by the app is inaccurate or inconsistent with the device's own reading.R26R58
  • Does not provide notifications for low battery levels or when the battery is fully charged.R115R357

Latest update · v2.1

What the developer says changed (the verdict above weighs this against what reviewers report):

Bug fixes and performance improvements.

Recurring themes

Ad Intrusiveness negative
Many recent reviews heavily criticize the app for an overwhelming number of loud, full-screen video ads that are disruptive, cannot be skipped, and often cause the app to freeze or become unusable. Users express frustration and often delete the app because of this.R100R183R186R187
Readability & Display positive
A significant number of users praise the app for its large, clear, and visually appealing battery graphic and percentage display. This is particularly valued by users who have difficulty seeing the small native battery indicator on their devices.R7R8R17R18
Lack of Features negative
Reviewers frequently point out that the app offers very basic functionality, often no more than what the device already provides. There are requests for features like a 12-hour clock option, widgets, battery optimization, low-level sound alerts, and more detailed battery information.R16R19R31R74
Reliability & Accuracy mixed
While many long-term users commend the app for being consistently reliable and accurate in reporting battery status, a few recent reviews mention inaccuracies in the displayed percentage or issues with charging speed.R1R3R4R5

Who it's for

This app is for users who prioritize a large, clear, and visually appealing battery percentage display over advanced features or a completely ad-free experience R17R28. It's particularly suitable for individuals who find the native battery indicator difficult to see R37R42. It is not for users who need detailed battery analytics, optimization tools, widgets, or an ad-free experience R16R183.

Evidence note: The recent reviews show a strong negative trend regarding ads and lack of features, which contradicts the high lifetime rating. The developer's notes mention 'bug fixes and performance improvements,' but recent reviews still report app breaking due to ads, suggesting these issues persist or have worsened.

Frequently asked

Does Zen Battery offer a 12-hour clock format?
No, Zen Battery's clock is currently stuck in a 24-hour (military) format, and there is no setting within the app to change it to a 12-hour format R31R212R60.
Are there many ads in the Zen Battery app?
Yes, many recent users report an excessive number of loud and disruptive video ads, often full-screen, which can make the app difficult to use or cause it to freeze R100R183.
Does Zen Battery provide advanced battery information or optimization features?
No, Zen Battery is primarily a visual battery indicator and does not offer advanced information like battery health, optimization tools, or detailed usage statistics beyond basic charging status R16R19R74.

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. [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.
  2. [R28] 5/5 · US Robert: By far the best battery app, have been using this for about 3 years, with eyes not the best, the large battery makes it easier for to see battery level.
  3. [R37] 5/5 · US My Kind of Level: As I age, I am unable to see the little battery level indicator on the upper right hand corner of my iPhone. I discovered this app. Like it very much. When I hit it, it displays, in large enough symbols and numbers, the level of the battery charge. That’s all I need.
  4. [R42] 5/5 · US My seventy year old eyes: I use this app because it helps me see how much battery I have left. Sometimes it’s difficult to read the small text on my iPhone. Plus it’s nice to know how many hours of standby hours I have left. Good app. VERY visible.
  5. [R1] 5/5 · US Competent: Very handy and accurate!
  6. [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.
  7. [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
  8. [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.
  9. [R2] 5/5 · US Great: Made good sound and fun bad news I had to pay for the battery design
  10. [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
  11. [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.
  12. [R15] 5/5 · US #1: Best free battery app out there! Don’t hesitate to download it. Awesome graphics!
  13. [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
  14. [R183] 3/5 · US Ads: TOO MANY ADS!!!!
  15. [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.
  16. [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.
  17. [R16] 1/5 · US Great app… Unless you want to know anything helpful about your battery?: This app is great if you want to see a color drawing of your battery, in a dozen different colors and don’t need any more information then your device already tells you up at the top of the screen on the right, otherwise it’s pretty useless.
  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. [R74] 1/5 · US What !??!: Does nothing really
  20. [R158] 1/5 · US Needs more: Not very good not very good
  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. [R212] 1/5 · US Only issue I have: The clock seems to be stuck in the 24 hr aka, military time and I see no way to change it to standard 12 hr time. My phone is iPhone XR and time in settings is 12 hr but this app insists on 24 hrs.
  23. [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?
  24. [R60] 4/5 · US Clock: Only thing I don’t like is you can’t change clock from military time to normal time
  25. [R26] 2/5 · US Me: Not accurate
  26. [R58] 5/5 · US Just don’t understand it: iPhone XS says I have 78% battery left yet the app says only have 75%. Who should I believe? Apple or you!
  27. [R115] 3/5 · US Great app wish it could be more interactive.: I would like it more if I could add sound to signal low level.
  28. [R357] 1/5 · AU Does not buzz: Does not notify when battery is full
  29. [R7] 5/5 · US Great battery graphic: Long time app user here. Best one out there. No problem seeing the level on this app.
  30. [R18] 5/5 · US Reliable: I’ve used the Zen Battery app for years. I’ve found that it far more reliable and the presentation is more clear than the basic iPhone advisory in the upper right corner of the screen. I thank the developers.
  31. [R4] 5/5 · US Cheryl Williams: This app is awesome. I have had it for like 4-5years and it charges my phone so fast!! I recocomend people to download it! Well worth it!

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