Comparison

Relativity Calendar vs NanoLuna

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

NanoLuna

Features
Read full description

NanoLuna undergoes a massive V2 evolution! NanoLuna is a smart calendar app designed for users with complex holiday schedules. Say goodbye to the daily struggle of deciding whether to set an alarm for tomorrow. 【What's New: Flexible Groups & Visual Timeline】 • Group Alarms: Break free from single-alarm limits. Setup custom alarms automatically categorized by "Workday", "Weekend", and "Holiday" groups. Support for up to 5 alarms per group. • Innovative Timeline View: A new dedicated rule management page. Swipe the timeline to visually review and organize all your alarm schedules. • Smart Wake Now Free: Our premium "Smart Alarm" waking strategy is completely unlocked and permanently free for all users! • UI/UX Overhaul: Modern visual redesign for smoother and better interaction. 【Smart Holiday Alarms】 • Automatically recognizes workdays, statutory holidays, weekends, and make-up days. • Rings on workdays, silences on holidays, and rings as usual on make-up workdays. • Supports Siri Shortcuts to voice-control native system alarms. • Custom ringtones supported (up to 30 seconds). 【Night Clock】 • Night Clock: a fullscreen landscape clock designed for bedside viewing. 【Beautiful Desktop Widgets】 • 3 Sizes: Small (Today Glance), Medium (Month View + Holidays), Large (Comprehensive info). • Real-time lunar calendar, solar terms, and holiday countdowns. • iOS frosted glass design blending seamlessly onto your home screen. 【Lunar & Traditional Calendars】 • Precise Gregorian-Lunar conversion (1900-2100). • Exact dates for 24 Solar Terms. • Traditional Almanac dos and don'ts. • Countdown to the next holiday for easy tracking. 【Multi-Region Support】 • China: Complete statutory holidays + adjusted make-up workdays. • Japan: Public holiday calendar. • Korea: Public holiday calendar. • Auto-detects device region with smart recommendations. Download NanoLuna and make every morning anxiety-free.

Screenshots

Relativity Calendar4 screens
NanoLuna4 screens

Verdict

The call

The clearest difference is in-app purchases: Relativity Calendar at none against NanoLuna's 1. Relativity Calendar also leads on iOS requirement (15.0 vs 26.0). NanoLuna's advantage is update cadence (fortnightly vs every 2 months). On price, ads 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

Both are free to download. NanoLuna sells 1 one-off in-app purchase. Relativity Calendar asks for nothing beyond the download.

UpkeepUpdate frequency

Relativity Calendar ships an update every 2 months, NanoLuna fortnightly. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 7 level
Relativity Calendar versus NanoLuna: the parameters behind the verdict, then further details
ParameterRelativity CalendarNanoLuna
PriceFreeFree
Rating4.9 (17 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings17 — better—
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size3 MB11 MB
Age rating4+4+
DeveloperJonathan Cole恒俭 董

In-app purchases

None

Relativity Calendar

No in-app purchases

1 purchases

NanoLuna

One-time1
  • Pro Lifetime$0.99

Questions

Is Relativity Calendar free?
Relativity Calendar is free to download, with no in-app purchases.
Is NanoLuna free?
NanoLuna is free to download, with in-app purchases available.
Do Relativity Calendar or NanoLuna have ads?
Neither Relativity Calendar nor NanoLuna shows ads.
Which is updated more often, Relativity Calendar or NanoLuna?
Relativity Calendar ships an update every 2 months, and NanoLuna fortnightly. Most recently, Relativity Calendar was updated on November 7, 2026 and NanoLuna on November 9, 2026.

Other comparisons