iDays Pro vs Color Date One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iDays Pro
This app helps you track and count down to important dates in your life. It offers customizable themes, event reminders, and a date calculator to ensure you never miss a special occasion. Advanced features include Touch ID sign-in and iCloud backup for enhanced privacy and data security.
- Count-down/Count-up events
- Multiple themes
- Date calculator
- User-defined time reminders
- Touch ID sign-in
- iCloud backup
- Apple Watch support
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"iDays" is a tiny assistant app that helps you record important days in your life. Never miss his/her anniversary. For instance: How many days have you been dating with your sweet heart? How long is the New Year’s Day? How many days have you been in the world? Basic Features: - Count-down/Count-up events - Multiple themes for your selection - Date calculator - Events auto ordering - Events classification handling - User-defined time reminder - History on today Advanced Features: - Support Touch ID sign-in, save your privacy from being offended - Notifications display widget, drop down notifications then you'll check the event (two patterns of notification bar) - Support iCloud backup, never miss important days any more - System calendar event import/export - Support Apple Watch - Support 3D Touch - Support iMessage - Support iOS 10
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: iDays Pro at 73% against Color Date One's 0%. iDays Pro also leads on rating (4.7 vs 1.0) and ratings volume (80 vs 1). On price, update cadence, ads and in-app purchases 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
iDays Pro costs $1.99 and Color Date One $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iDays Pro holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: iDays Pro has 80 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 73% of iDays Pro's written reviews are positive against 0% of Color Date One's.
Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on October 19, 2026.
| Parameter | iDays Pro | Color Date One |
|---|---|---|
| Price | $1.99 | $1.99 |
| Rating | 4.7 (80 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 72.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 80 — better | 1 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod, Apple Watch |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 201 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Gerinn LLC | NAOTO UENO |
Customer experience
iDays Pro
Color Date One
In-app purchases
iDays Pro
No in-app purchases
Color Date One
No in-app purchases
