# Battery and Data Alarmer > Monitors data usage and battery, alerting users to exceed limits. (iPhone/iPad app by Writeback Co.,Ltd..) - Source: https://appshunter.io/ios/app/battery-and-data-alarmer/id848173067 (this page in markdown: same URL + `.md`) - Developer: [Writeback Co.,Ltd.](https://appshunter.io/developer/382508339) - Category: Utilities, Finance - Price: Free with in-app purchases - Rating: 4.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 10 MB - Languages: English, Japanese - Released: 2014-04-14 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/battery-and-data-alarmer/id848173067/reviews.md ## What is Battery and Data Alarmer? It gives you notifications of data communication volume based on your communication usage limit for the month or selected days in addition to a remaining battery. You don’t need to long in every day to confirm it. Once it exceeds a specified volume, it sends a message or beeps an alarm to notify you the status. You can set up an alarm as you like including the percentage and an absolute volume. There are 60 kinds of alarm sounds for you to differentiate each situation. It also keeps a track of daily data communicant volume separately for mobile and WiFi. Various timelines have been visualized in forms of a list and a graph. It allows you to understand data communication volumes and battery consumption for various apps. Use this apps to safely use of iPhone! - In the case of using,please turn on the “Background App Refresh” switch in “Settings”. - It has little impact on a battery to use it in the background of your iPhone. -Calculation does not affect regardless if your iPhone is on or off. However, when you reset your iPhone, Apps might not be restarted from iOS. It is recommended to start this App once you restart iPhone. - As for mobile communication, the volume for 3G, 4G and LTE will be summed up. In addition, there is a small difference in transmission volume from each carrier as communication volume is calculated by iPhone. So please use the total usage volume as your reference. ## Key features - Data usage notifications - Battery level alerts - Customizable alarm settings - Daily mobile/WiFi data tracking - Data and battery usage visualization - App-specific data consumption tracking ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Delete AD and Unlimited | $1.99 | one-time | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/battery-and-data-alarmer/id848173067/reviews.md ### 3/5 — Battery alarm sound difficult to configure *2019-11-10, version 2.01* This app has many interesting features but I wanted mainly to tell me when my battery dropped below a certain level. However the audio alarm does not work in the foreground or background. The app gives a message that it won’t work in foreground but i also can’t get it to work in the background so the app is of little use to me. There also appears to be no way to ask for assistance. ## Frequently asked questions about Battery and Data Alarmer ### What is Battery and Data Alarmer? Battery and Data Alarmer is a utility app for iPhone and iPad that notifies you about your data communication volume and remaining battery. It sends alerts when you exceed specified data limits, helping you manage your usage. ### How does Battery and Data Alarmer track data usage? It tracks daily data communication volume separately for mobile and WiFi. The app sums up 3G, 4G, and LTE volumes for mobile communication. Please note that communication volume is calculated by the iPhone, so there might be small differences from your carrier's reported usage. ### Can I customize the alerts in Battery and Data Alarmer? Yes, you can set up alarms as you like, including the percentage and absolute volume for data usage. The app offers 60 kinds of alarm sounds to differentiate various situations. ### Does Battery and Data Alarmer impact battery life? The app has little impact on the battery when used in the background on your iPhone. It is designed to be efficient, and its calculations do not affect battery life regardless of whether your iPhone is on or off. ### How often is Battery and Data Alarmer updated? The latest version is 2.30, and it was last updated on January 10, 2023. This indicates a history of updates, suggesting ongoing support and improvements. ### What devices is Battery and Data Alarmer compatible with? Battery and Data Alarmer is compatible with iPhone, iPad, and iPod. It is suitable for users who want to monitor their device's data and battery on these Apple devices. ### What is the age rating for Battery and Data Alarmer? The app has an age rating of 4+, making it suitable for a wide range of users. This rating suggests it contains no mature content and is generally safe for younger audiences. ### What should I do after restarting my iPhone if I use Battery and Data Alarmer? After restarting your iPhone, it is recommended to start the Battery and Data Alarmer app once. This ensures that background app refresh and tracking functionalities restart correctly from iOS. ## Version history (last 1 release) ### 2.30 — 2023-01-10 Fixed an issue where the display of mobile traffic volume was abnormal when 4GB or more was communicated over WiFi in a short period of time. ## Apps similar to Battery and Data Alarmer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Battreciever](https://appshunter.io/ios/app/battreciever/id1483457086) | — | Free | Utilities | | [Watch Battery Logger](https://appshunter.io/ios/app/watch-battery-logger/id1380489553) | 5.0 (2) | Free | Utilities | | [Horizontal Accelerometer](https://appshunter.io/ios/app/horizontal-accelerometer/id6444095874) | — | Free | Utilities | | [XTPenetrate](https://appshunter.io/ios/app/xtpenetrate/id1371223251) | — | Free | Utilities | | [Automaxx Solar MPPT](https://appshunter.io/ios/app/automaxx-solar-mppt/id1401269712) | — | Free | Utilities | | [Audio Converter - Pro Tools](https://appshunter.io/ios/app/audio-converter-pro-tools/id1660627639) | 4.6 (26) | Free | Utilities | ## More apps by Writeback Co.,Ltd. - [Moment - Time of dogs.](https://appshunter.io/ios/app/moment-time-of-dogs/id382508336) - [Fish in Aquamarine-FUKUSHIMA](https://appshunter.io/ios/app/fish-in-aquamarine-fukushima/id432732934) - [Snow Monkeys](https://appshunter.io/ios/app/snow-monkeys/id563127239) - [AutoDiary+](https://appshunter.io/ios/app/autodiary-plus/id1478718334) All apps by Writeback Co.,Ltd.: https://appshunter.io/developer/382508339 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*