SignalClock Lite vs Atomic Exact Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SignalClock Lite
This utility app displays a digital clock with a time signal function using local notifications. It offers multiple sound sets and font options. The free version has limitations on scheduling time signals to half-hour intervals.
- Local notification time signals
- Multiple sound sets
- iOS 10 font support
- Half-hour signal scheduling (free edition)
- Digital clock display
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Digital clock has time signal function based on Local Notification Center. It’s free edition of “SignalClock”. 5 different signal sound sets. All fonts iOS 10 supports are available in clock. 5 tone type are available in all sound file sets. Free edition limitations : - Able to schedule time signals on half hour unit ex. 00:00, 00:30, 01:00 ...
Atomic Exact Time
Synchronize your device's clock with network time sources, view its offset, and use a corrected display. Features include countdown timers, team targets, and world clocks. Optional Pro plans offer advanced features and ad removal.
- Network time synchronization
- Offset and uncertainty measurement
- Corrected clock display
- Countdown timers
- Team countdown sharing
- World clocks
- Home-screen widget
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See your device clock in context with Atomic Exact Time. Compare it with network time sources, view the measured offset and estimated uncertainty, and use a corrected clock display. Start with the free clock and synchronization tools. The free version includes ads. Optional Pro plans remove ads and unlock precision targets, team countdowns, detailed accuracy reports, Theme Studio, timecode and export tools. Prepare a start: choose an exact time or a duration, check calibration and notification permissions, and test the sound before starting. Save, edit, duplicate and reorder your frequent targets. Share a team target through a link or QR code. Each participant uses their own device calibration. Participant attendance and location are not tracked. Use world clocks, Studio Mode, accessibility preferences and a home-screen widget that shows the latest calibration. Choose from 15 interface languages. Timing accuracy depends on network conditions, device behavior and measurement quality. Uncertainty is an estimate, not a guarantee. Keep the app open for the best countdown timing. Background notification delivery depends on the operating system. Available Pro plans and localized prices are supplied by your store. Monthly and yearly subscriptions renew automatically until canceled in store account settings. A lifetime purchase is a single payment when offered. Restore Purchases is available. No app account is required. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: SignalClock Lite at none against Atomic Exact Time's 3. SignalClock Lite also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.4). Atomic Exact Time's advantage is update cadence (every 5 weeks vs every 7 months). On price 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. Atomic Exact Time sells 3 in-app purchases, starting at $2.99 per month. SignalClock Lite asks for nothing beyond the download.
SignalClock Lite ships an update every 7 months, Atomic Exact Time every 5 weeks. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | SignalClock Lite | Atomic Exact Time |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 7 months | Every 5 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Apple TV — better |
| Requires iOS | 12.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 28 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Masafumi Endoh | SUPER KIM KIMYA VE TEKSTIL SANAYI TICARET LIMITED SIRKETI |
Customer experience
SignalClock Lite
Atomic Exact Time
In-app purchases
SignalClock Lite
No in-app purchases
Atomic Exact Time
- Atomic Exact Time Pro7 Days trial$2.991 Month
- Pro Yearly$19.991 Year
- Atomic Exact Time Pro$2.99
Questions
Is SignalClock Lite free?
Is Atomic Exact Time free?
Do SignalClock Lite or Atomic Exact Time have ads?
Which is updated more often, SignalClock Lite or Atomic Exact Time?
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