Relativity Calendar vs Color Date One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Color Date One
Customize your watch face with a highly visible date complication. Choose from various formats, adjust size, and personalize colors to match your style. Supports Japanese era names for a unique touch.
- Highly visible date complication
- Adjustable circular complication size
- Customizable date row colors
- Multiple date formats
- Japanese era name support
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Main Features 1. Highly visible date complication. 2. Circular complication is single element of weekday or day, which is adjustable in size. 3. Can set color of each date row using grid, slider, or color code. 4. Choose from 3 date formats, such as "year/month/day". 5. Compatible with Japanese era name. * Complications placed on colored dials are in monotone.
Screenshots
Verdict
The clearest difference is review sentiment: Relativity Calendar at 100% against Color Date One's 0%. Relativity Calendar also leads on price (Free vs $1.99) and rating (4.9 vs 1.0). Color Date One's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.0 vs 15.0). 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
Relativity Calendar is free to download; Color Date One costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Relativity Calendar holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Relativity Calendar has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Relativity Calendar's written reviews are positive against 0% of Color Date One's.
Relativity Calendar ships an update every 2 months, Color Date One every 3 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | Relativity Calendar | Color Date One |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.9 (17 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 17 — better | 1 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Jonathan Cole | NAOTO UENO |
Customer experience
Relativity Calendar
Color Date One
In-app purchases
Relativity Calendar
No in-app purchases
Color Date One
No in-app purchases
Questions
Is Relativity Calendar free?
Is Color Date One free?
Which has better reviews, Relativity Calendar or Color Date One?
Do Relativity Calendar or Color Date One have ads?
Which is updated more often, Relativity Calendar or Color Date One?
Other comparisons
