247+ iOS apps curated and reviewed
The best the date calculator pro apps on iPhone average 4.6★ across 247+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.7★ (2.6K) | Yes | Yes | Nov 2026 | |
| 2 |  | Free | 4.7★ (9.9K) | Yes | No | Nov 2026 | |
| 3 |  | Free | 4.8★ (31) | Yes | Yes | Oct 2026 | |
| 4 |  | $0.99 | 4.8★ (959) | No | No | Nov 2026 | |
| 5 |  | Free | 3.4★ (68) | No | Yes | Oct 2026 | |
| 6 |  | Free | — | No | Yes | Oct 2026 | |
| 7 |  | Free | — | No | Yes | Jun 2026 | |
| 8 |  | Free | 4.9★ (410K) | Yes | No | Nov 2026 |
Easily calculate the duration between two dates, with or without accounting for the time of day. You can also add or subtract various time units from a specific date. The results are automatically converted into multiple units for your convenience.
Calculate the exact number of days, hours, and seconds between any two dates. This tool also allows you to find the date before or after a specified period, making it useful for tracking deadlines, events, or financial products.
This app helps you calculate date and time durations, add or subtract time from dates, and determine working days. It also converts between calendars and time zones, and estimates ovulation and pregnancy due dates. The design is simple and intuitive.
