D vs Timer calendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
D
Easily set and track important dates, such as D-Day. This utility app helps you monitor the remaining time until your specified events.
- Set D-Day
- Check remaining time
- Event tracking
- Simple interface
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Set D-Day and check remain.
Timer calendar
Track your time spent on various activities like working out or studying. Visualize your progress with daily, weekly, and monthly reports. Gain insights into your time management habits.
- Time recording for activities
- Calendar integration
- Daily progress reports
- Weekly progress reports
- Monthly progress reports
- Time measurement
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When you start timer, moon gets full Record your time for working out, studying or anything you want measure. And check it out daily, weekly, monthly.
Screenshots
Verdict
The clearest difference is in-app purchases: D at none against Timer calendar's 1. Timer calendar's advantage is update cadence (every 5 weeks vs every 3 months) and iOS requirement (14.0 vs 17.0). 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
Both are free to download. Timer calendar sells 1 one-off in-app purchase. D asks for nothing beyond the download.
D ships an update every 3 months, Timer calendar every 5 weeks. The most recent releases landed on September 23, 2026 and September 4, 2026 respectively.
| Parameter | D | Timer calendar |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 95.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Si-Wan Yoon | Yongjun Lee |
Customer experience
D
Timer calendar
In-app purchases
D
No in-app purchases
Timer calendar
- Remove Ads$0.99
