Comparison

Battery Grapher vs NurseClock

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

NurseClock

This alarm app is tailored for nurses and shift workers with irregular schedules. It allows users to set alarms for specific work dates rather than just daily or weekly repeats, simplifying wake-up routines for rotating shifts.

Highlights
  • Set alarms for specific dates
  • Batch-create alarms for entire week
  • Monthly calendar view of alarms
  • Customizable sounds and snooze
  • Auto-delete old alarms
  • Import schedules from NurseGrid (Pro)
  • Automatic calendar sync (Pro)
Read full description

NurseClock is the alarm app designed specifically for nurses and shift workers who don't work the same days every week. Unlike regular alarm apps that only offer daily or weekly repeats, NurseClock lets you set alarms for the exact dates you work. Pick your shifts on a calendar, set your wake-up time, and create all your alarms at once. KEY FEATURES: - Create alarms for specific dates -- not just weekly repeats - Batch-create alarms for your entire week in seconds - See all your alarms on a monthly calendar view - Customizable alarm sounds and snooze settings - Auto-delete old alarms to keep your list clean NURSECLOCK PRO: - Import your shift schedule from NurseGrid - Automatic calendar sync keeps your alarms updated when your schedule changes - Paste your calendar link once, and NurseClock creates alarms for every shift NurseClock uses iOS AlarmKit so your alarms appear on the Lock Screen and work like native iOS alarms -- they ring even in Silent Mode. Built for nurses. Stop fumbling with alarm apps that weren't designed for rotating schedules. NurseClock Pro is available as a subscription. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in Settings > Apple ID > Subscriptions. Terms of Service: https://nurseclock.pages.dev/terms-of-service Privacy Policy: https://nurseclock.pages.dev/privacy-policy

Screenshots

Battery Grapher4 screens
NurseClock3 screens

Verdict

The call

The clearest difference is price: NurseClock at Free against Battery Grapher's $1.99. NurseClock also leads on rating (5.0 vs 4.3). Battery Grapher's advantage is in-app purchases (none vs 2) and ratings volume (155 vs 1). On update cadence and ads 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

NurseClock is free to download; Battery Grapher costs $1.99 up front. NurseClock sells 2 in-app purchases, starting at $2.99 per month. Battery Grapher asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NurseClock holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Battery Grapher has 155 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Battery Grapher ships an update every 2 months, NurseClock every 3 months. The most recent releases landed on October 29, 2026 and October 15, 2026 respectively.

Scorecard8 real differences · 3 level
Battery Grapher versus NurseClock: the parameters behind the verdict, then further details
ParameterBattery GrapherNurseClock
Price$1.99Free — better
Rating4.3 (155 ratings)5.0 (1 ratings) — better
Positive reviews61.2% of reviews—
Number of ratings155 — better1
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
Best chart rank#160 — better—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size5 MB156 MB
Age rating4+4+
DeveloperJoshua BirdJose Montes De Oca Morfin

Customer experience

Battery Grapher

All ratings154 ratings
Positive81.8%
Neutral5.8%
Negative12.3%
Written reviews147 reviews
Positive61.2%
Neutral7.5%
Negative31.3%

NurseClock

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

NurseClock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Battery Grapher

No in-app purchases

2 purchases

NurseClock

Subscriptions2
  • NurseClock Pro Monthly$2.991 Month
  • NurseClock Pro Yearly$29.991 Year

Questions

Is Battery Grapher free?
Battery Grapher costs $1.99, with no in-app purchases.
Is NurseClock free?
NurseClock is free to download, with in-app purchases available.
Which has better reviews, Battery Grapher or NurseClock?
NurseClock is rated higher. Battery Grapher averages 4.3 out of 5 from 155 ratings, while NurseClock averages 5.0 from 1 ratings.
Do Battery Grapher or NurseClock have ads?
Neither Battery Grapher nor NurseClock shows ads.
Which is updated more often, Battery Grapher or NurseClock?
Battery Grapher ships an update every 2 months, and NurseClock every 3 months. Most recently, Battery Grapher was updated on October 29, 2026 and NurseClock on October 15, 2026.

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