249+ iOS apps curated and reviewed
If you already know AtomicClock, this is the deeper bench. 249+ time sync apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (5.5K) | Yes | Yes | Aug 2026 |
| 2 |  | Free | 4.5★ (1K) | Yes | Yes | Aug 2026 |
| 3 |  | Free | — | Yes | No | Aug 2026 |
| 4 |  | Free | — | No | No | May 2026 |
| 5 |  | Free | — | No | Yes | Aug 2026 |
| 6 |  | Free | — | No | No | May 2026 |
| 7 |  | Free | — | — | No | Jul 2026 |
| 8 |  | Free | — | No | No | May 2026 |
This app displays the exact current time synchronized with NTP servers, offering a customizable clock view for precise time checks. It's ideal for setting watches, verifying timestamps, or comparing local and network time.
This app helps synchronize radio-controlled watches by simulating time signal waves. It supports various international time signal standards and offers a 'Beast Mode' for faster synchronization. Simply place your watch near your device's speaker and start the process.
This app provides a guided, countdown-based method for manually adjusting clocks. It uses your device as a precise time reference with visual and audio cues to ensure accurate synchronization for multiple clocks.
Easily track the time in multiple cities worldwide with customizable analog or digital clock widgets. Get instant access to local times from your Home Screen, Lock Screen, or Dynamic Island. Includes a conversion tool for comparing times and managing schedules across different zones.
This app simulates radio-controlled clock signals to help your watch synchronize its time when terrestrial signals are unavailable. It offers guides for popular watch brands and checks environmental conditions before transmission.
This app provides highly accurate time synchronization using NTP, offering visual and auditory cues for precise second-level timing. It's ideal for professionals who need to catch exact moments, such as during events, filming, or technical work.
This utility app displays the precise current time, accurate to the millisecond, by querying multiple NTP servers. It offers detailed insights into clock synchronization and network performance, with advanced features available via a one-time purchase.
Easily track time zones for friends, family, and colleagues worldwide. Features dynamic backgrounds, personalized photos, and home-screen widgets for at-a-glance updates. Supports over 200k locations, even offline, and syncs across devices via iCloud.
Effortlessly track your work hours with automatic time clock features and geo-fencing. Monitor overtime, remaining work time, and export detailed time sheets in PDF and CSV formats. Manage projects, tasks, and time off with ease.