Comparison

Relativity Calendar vs BatteryMonitorComplication

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

Head to head
About

Relativity Calendar

This app redefines how you view dates by allowing you to express any day relative to any month. See custom dates like 'May 32nd' or 'March 93rd' at a glance. It offers home screen widgets and Apple Watch complications for easy access.

Highlights
  • Express dates relative to any month
  • Home screen widgets with color customization
  • Apple Watch complications
  • iOS 16 Lock Screen widgets
  • Track custom dates and holidays
Features
Read full description

Relativity Calendar is an app that tells you what day it is, relative to any month. For example, June 1st can also be written as May 32nd or March 93rd. Set any month you want, and you'll be able to see it at a glance in your widgets and Apple Watch! Whether it's the month of your birth, an important holiday, or Truck Month, Relativity Calendar will (more or less) help you keep track. Features: - Pick any month, even if it doesn't make sense. Especially if it doesn't make sense. - Full support for home screen widgets, with full color customization - Full support for Apple Watch, including complications - Supports iOS 16 Lock Screen widgets.

About

BatteryMonitorComplication

Features
Read full description

BatteryMonitor – Battery life for your Apple Watch BatteryMonitor estimates how long your Apple Watch will last — in the app and as a watch face complication. KEY FEATURES • Smart calculation – learns from your charge and discharge cycles • Automatic measurements – every 5% battery change • Day, night, and workout drain – different discharge rates • Complication – remaining time on your watch face • Date & Weekday – shows date until threshold is reached, then remaining time. • Statistics – long-term cycles and usage overview • Measurement history – all values including discharge rates WORKOUTS & HIGH DRAIN • Adjusts the display during workouts or high activity • Workout badge on the circular complication • Optional push prompt to improve statistics HIGHLIGHTS • Accounts for recent charging • For Apple Watch Series 6–12, SE, and Ultra • Shows estimated time until battery is empty • Multiple complication sizes WHY BATTERYMONITOR? After just a few days, you get a much more useful forecast than a percentage alone — especially with the complication enabled. IMPORTANT Accuracy improves with regular use. Measurements happen in 5% steps; exact battery readings are limited by the system, so updates may feel slightly delayed. Questions or feedback? Use App Support.

Screenshots

Relativity Calendar4 screens
BatteryMonitorComplication3 screens

Verdict

The call

The clearest difference is price: Relativity Calendar at Free against BatteryMonitorComplication's $0.99. Relativity Calendar also leads on iOS requirement (15.0 vs 17.6). BatteryMonitorComplication's advantage is update cadence (every 6 days vs every 2 months). On ads, in-app purchases and device support 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

Relativity Calendar is free to download; BatteryMonitorComplication costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Relativity Calendar ships an update every 2 months, BatteryMonitorComplication every 6 days. The most recent releases landed on September 28, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Relativity Calendar versus BatteryMonitorComplication: the parameters behind the verdict, then further details
ParameterRelativity CalendarBatteryMonitorComplication
PriceFree — better$0.99
Rating4.9 (17 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings17 — better—
Update frequencyEvery 2 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS15.0 — better17.6
Further details — not scored
Size3 MB9 MB
Age rating4+4+
DeveloperJonathan ColeMichael Burch

In-app purchases

None

Relativity Calendar

No in-app purchases

None

BatteryMonitorComplication

No in-app purchases

Questions

Is Relativity Calendar free?
Relativity Calendar is free to download, with no in-app purchases.
Is BatteryMonitorComplication free?
BatteryMonitorComplication costs $0.99, with no in-app purchases.
Do Relativity Calendar or BatteryMonitorComplication have ads?
Neither Relativity Calendar nor BatteryMonitorComplication shows ads.
Which is updated more often, Relativity Calendar or BatteryMonitorComplication?
Relativity Calendar ships an update every 2 months, and BatteryMonitorComplication every 6 days. Most recently, Relativity Calendar was updated on September 28, 2026 and BatteryMonitorComplication on October 7, 2026.

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