# Relativity Calendar vs BatteryMonitorComplication

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.

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.

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.

## The numbers

| Metric | Relativity Calendar | BatteryMonitorComplication |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.9 (17 ratings)](https://appshunter.io/ios/app/relativity-calendar/id1481494405/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 3 MB | 9 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Cole](https://appshunter.io/developer/1093735229) | [Michael Burch](https://appshunter.io/developer/1797381352) |

## What reviewers say

### Relativity Calendar

[App page](https://appshunter.io/ios/app/relativity-calendar/id1481494405)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### BatteryMonitorComplication

[App page](https://appshunter.io/ios/app/batterymonitorcomplication/id6742497714)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*