Comparison

Battery Grapher vs Omni Tech

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

Head to head
About

Battery Grapher

This app tracks your device's battery usage over time and uses your historical data to predict future battery levels. It's designed for low energy consumption and offers customizable notifications to help you manage charging times.

Highlights
  • Historical battery level graphing
  • Smart future battery predictions
  • Low energy consumption design
  • Customizable battery notifications
  • Supports all complications and widget sizes
Features
Currently charting
Read full description

Battery Grapher graphs your historical battery levels and learns your habits to make smart predictions on what your future battery levels will be. Developed specifically with energy consumption in mind, Battery Grapher has almost no impact on battery life. SMART PREDICTIONS Battery Grapher uses historical battery levels to intelligently predict what your battery level will be throughout the rest of the day, allowing you to plan when to next charge your device. The longer you have Battery Grapher installed, the more accurate future battery level predictions will be. LOW ENERGY CONSUMPTION Battery Grapher is made for people who want to extend the battery life, meaning that low energy usage is a priority. The app runs a background task only once an hour, and doesn't require a network connection, which keeps energy consumption extremely low. CUSTOMIZABLE NOTIFICATIONS Battery Grapher allows you to set notifications that fit your needs. You can get the app to notify you when you battery drops below a preset percentage, or if you only have a certain number of hours left before your battery runs out. (currently only available on watchOS) ALL COMPLICATIONS & WIDGET SIZES SUPPORTED Battery Grapher supports all complications & widget sizes. Complications can show hours before needing to charge, or battery %. Both complications and widgets are customizable from within the app.

About

Omni Tech

Features
Read full description

Omni is a comprehensive and user-friendly app tailored specifically for wind farm workers to enhance their work efficiency and safety. Here are the detailed features and functions: ### Work Management - **Check-in and Check-out** Omni allows workers to conveniently check in when they start their shift and check out when they finish. This feature helps accurately track working hours and attendance, ensuring proper workforce management and compliance with labor regulations. - **Location Tracking** The app provides real-time location tracking for workers. Supervisors can monitor the whereabouts of their team members within the wind farm, which is crucial for coordinating tasks and ensuring everyone is in the right place at the right time. This feature also enhances safety by allowing quick identification of workers' locations in case of emergencies. ### Safety Features - **SOS Function** In case of an emergency, workers can quickly activate the SOS function. This sends an immediate alert to designated contacts or the control center, along with the worker's current location. This feature is vital for ensuring a rapid response in critical situations, potentially saving lives and reducing the impact of accidents. ### User Experience - **Intuitive Interface** Omni features a simple and intuitive interface that is easy to navigate, even for workers who may not be highly tech-savvy. The app is designed to be user-friendly, ensuring that all functions are easily accessible and understandable. - **Offline Capability** Considering the remote and potentially low-connectivity environments of wind farms, Omni is designed to function offline. Workers can still perform essential tasks like check-in/check-out and access important information without an active internet connection, ensuring uninterrupted use. ### Additional Benefits - **Data Security** Omni prioritizes data security, ensuring that all information related to workers' check-ins, locations, and SOS alerts is stored and transmitted securely. This protects workers' privacy and maintains the integrity of operational data. - **Customizable Alerts** Supervisors can set up customizable alerts for various events, such as missed check-ins or workers entering restricted areas. This helps in proactive monitoring and quick resolution of potential issues. Omni is more than just an app—it's a powerful tool that streamlines work processes, enhances safety, and provides peace of mind for both workers and supervisors in the challenging environment of wind farms.

Screenshots

Battery Grapher4 screens
Omni Tech3 screens

Verdict

The call

The clearest difference is price: Omni Tech at Free against Battery Grapher's $1.99. Omni Tech also leads on update cadence (every 10 days vs every 2 months). Battery Grapher's advantage is chart position (#160 vs unranked). On ads, in-app purchases, 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

Omni Tech is free to download; Battery Grapher costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Battery Grapher ships an update every 2 months, Omni Tech every 10 days. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 8 level
Battery Grapher versus Omni Tech: the parameters behind the verdict, then further details
ParameterBattery GrapherOmni Tech
Price$1.99Free — better
Rating4.3 (155 ratings) — better—
Positive reviews61.2% of reviews—
Number of ratings155 — better—
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
Best chart rank#160 — better—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size5 MB61 MB
Age rating4+17+
DeveloperJoshua BirdShenzhen ConfigReality Technology Co., Ltd.

Bugs and requests

Battery Grapher

Reported bugs

18 issues
  • Widget not displaying on initial installation
  • Complication shows stale data and doesn't refresh automatically
  • Battery percentage stuck at incorrect values (e.g., 73%, 68%)
  • Accuracy status fluctuates rapidly between good and bad
  • Missing data warnings despite app being in dock
Show 13 more
  • Charge-discharge cycle recognition fails (shows straight lines)
  • App crashes on iPad and certain iOS versions
  • Complication capped at 47-48 hours on Apple Watch Ultra
  • Incorrect battery readings after full charge
  • Notifications arrive delayed or not at all
  • App shows charging when device is not charging
  • Data loss after watch pairing/unpairing
  • Graphs display inverted or incorrect usage patterns
  • 24-hour time format setting non-functional
  • Text cutoff on complication at bottom of watch face
  • Accuracy never improves beyond 'bad' status
  • App requires manual watch face switching to update
  • Predictions wildly inaccurate on newer Apple Watch models

Requested features

18 requests
  • Watch complication for Smart Stack (watchOS 10+)
  • Support for Apple Watch Ultra with correct 36-hour battery display
  • Low power mode detection and separate prediction profiles
  • Force refresh button in app
  • More frequent update intervals (user-configurable)
Show 13 more
  • 24-hour time format option
  • Charging time estimation while device is charging
  • Notifications for full charge completion
  • Battery percentage display in widgets
  • MacBook app version
  • App-specific battery drain identification
  • Historical data view (weekly/monthly)
  • Cross-device battery information (iPhone battery on Watch, etc.)
  • Landscape mode graph expansion
  • Multiple widget size options
  • Portuguese/Brazilian Portuguese localization
  • Manual dark mode toggle for iPhone
  • Watch complication for multiple stacks

Omni Tech

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Battery Grapher

No in-app purchases

None

Omni Tech

No in-app purchases

Questions

Is Battery Grapher free?
Battery Grapher costs $1.99, with no in-app purchases.
Is Omni Tech free?
Omni Tech is free to download, with no in-app purchases.
Do Battery Grapher or Omni Tech have ads?
Neither Battery Grapher nor Omni Tech shows ads.
Which is updated more often, Battery Grapher or Omni Tech?
Battery Grapher ships an update every 2 months, and Omni Tech every 10 days. Most recently, Battery Grapher was updated on October 29, 2026 and Omni Tech on October 28, 2026.

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