Comparison

Interval Voice Clock vs CUE! Time Signal Sync

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Interval Voice Clock

This app announces the current time at customizable intervals, allowing for hands-free time checks. It offers adjustable volume, voice options, and background playback, functioning entirely offline.

Highlights
  • Customizable announcement intervals
  • Adjustable announcement volume
  • Choice of male or female voice
  • Background playback support
  • Offline functionality
  • Multiple announcement types
Features
Read full description

Signal Time is a simple and easy-to-read app that announces the time at regular intervals. By default, it announces the time every 10 seconds (customizable). Use it in various situations—have it read the time aloud while you're busy getting ready in the morning, or check the time hands-free in the kitchen while waiting for your favorite show to start. No internet connection is required; the app works entirely offline. * Adjust the volume of both the second-hand sound and voice announcements (can be muted) * Set the announcement interval (from every 10 seconds to every hour) * Choose the type of voice used for announcements (female or male) * Supports background playback * Choose the type of announcements (Standard, Simple and Minimal)

About

CUE! Time Signal Sync

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.

Highlights
  • NTP-based time correction
  • 57/58/59/00-second countdowns
  • Signal sounds and haptics
  • Voice announcements
  • Landscape display mode
  • Display dimmer and keep-awake mode
Features
Read full description

Make every 00-second moment easier to catch. CUE! is a time signal app designed for timer setup and field time checks. With NTP-based time correction, 57/58/59/00-second countdowns, signal sounds, haptics, and voice announcements, CUE! helps you catch the exact 00-second moment. It is useful for temporary illumination timer panels, facility equipment, electrical work, lighting and audio systems, events, exhibitions, filming, streaming, stage work, live shows, store displays, and any situation where second-level timing matters. ■ CUE!’s Time Correction Logic CUE! is not a clock that simply displays the result of a single NTP request. NTP responses can vary depending on network routes, congestion, Wi-Fi, mobile networks, and device conditions. CUE! collects multiple NTP samples during startup and manual sync, checking each sample’s round-trip time (RTT) and time offset. Slow responses and offset outliers are filtered out. CUE! prioritizes stable samples. The selected NTP time is linked to the device’s monotonic clock at the moment it is received. After that, the in-app time display advances by adding elapsed monotonic time to the NTP reference. During automatic sync, CUE! may keep the previous NTP reference instead of applying a low-confidence result. This helps prevent sudden jumps caused by unstable network responses. ■ 57/58/59/00-Second Cues CUE! starts its countdown at 57 seconds every minute. 57 sec: 3 seconds before 58 sec: 2 seconds before 59 sec: 1 second before 00 sec: CUE! At 00 seconds, the time and cue display change color, making the exact moment easy to recognize visually. It helps when setting timer panels, checking lighting and audio timing, starting streams or recordings, managing events, and confirming 00-second timing in the field. ■ Sound, Haptics, and Voice CUE! can notify you at 57/58/59/00 seconds with signal sounds and haptics. Signal sound can be turned on or off. Use sound when allowed, or turn it off and rely on the display and haptics. Haptics use different patterns for warning seconds and the exact 00-second cue. Haptics can also be turned on or off. Voice announcements help you understand timing even when your iPhone is in your pocket. Choose announcements every 1 minute, 15 minutes, 30 minutes, or 1 hour. CUE! supports English, Japanese, Simplified Chinese, Traditional Chinese, and Korean. Other languages fall back to English. ■ Landscape Display Turn your iPhone sideways to use a larger clock display. This is useful when placing your iPhone on a stand, near a lighting console, audio mixer, or timer panel. ■ Field Features CUE! includes: ・Display dimmer ・Keep-awake mode ・Rear flashlight control ・Cue color toggle ・Haptics ON/OFF ・Signal sound ON/OFF ・Portrait and landscape layouts ・Remove ads option ■ Recommended For ・Temporary illumination timer setup ・Facility equipment time setting ・Electrical work and field timing ・Lighting and audio timing checks ・Events, exhibitions, stages, and live shows ・Streaming, recording, and filming start cues ・Store display and timer control checks ・Checking every 00-second moment clearly ・Using a clock that always shows seconds ・NTP-based time checking CUE! is a field time signal app that supports the exact “now.” ■ Free to Use CUE! is free to download. Banner ads are shown in the app. To avoid interrupting important timing moments, CUE! does not use interstitial ads. You can remove banner ads with an in-app purchase. ■ Notes CUE! uses public NTP servers to support its in-app time display. However, differences may occur due to network conditions, device status, screen rendering, audio output, haptics, speaker latency, or Bluetooth device latency. CUE! does not guarantee millisecond-level synchronization, measurement accuracy, broadcast timing, or legal proof of time. However, it can be a useful support tool for timer setup, 00-second alignment, and second-level time checks in field environments.

Screenshots

Interval Voice Clock2 screens
CUE! Time Signal Sync4 screens

Verdict

The call

The clearest difference is price: CUE! Time Signal Sync at Free against Interval Voice Clock's $1.99. CUE! Time Signal Sync also leads on review sentiment (100% vs 63%). Interval Voice Clock's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence 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

CostPrice · In-app purchases · Ads · Monetization

CUE! Time Signal Sync is free to download; Interval Voice Clock costs $1.99 up front. CUE! Time Signal Sync sells 1 one-off in-app purchase. Interval Voice Clock asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Voice Clock ships an update every 2 weeks, CUE! Time Signal Sync every 8 days. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
Interval Voice Clock versus CUE! Time Signal Sync: the parameters behind the verdict, then further details
ParameterInterval Voice ClockCUE! Time Signal Sync
Price$1.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews62.5% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 2 weeksEvery 8 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size32 MB6 MB
Age rating4+4+
DeveloperRyo OkamotoTAKAO OGASAWARA

Customer experience

Interval Voice Clock

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews16 reviews
Positive62.5%
Neutral25.0%
Negative12.5%

CUE! Time Signal Sync

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Interval Voice Clock

No in-app purchases

1 purchases

CUE! Time Signal Sync

One-time1
  • Remove Ads$2.99

Questions

Is Interval Voice Clock free?
Interval Voice Clock costs $1.99, with no in-app purchases.
Is CUE! Time Signal Sync free?
CUE! Time Signal Sync is free to download, with in-app purchases available.
Do Interval Voice Clock or CUE! Time Signal Sync have ads?
CUE! Time Signal Sync shows ads; Interval Voice Clock does not.
Which is updated more often, Interval Voice Clock or CUE! Time Signal Sync?
Interval Voice Clock ships an update every 2 weeks, and CUE! Time Signal Sync every 8 days. Most recently, Interval Voice Clock was updated on October 8, 2026 and CUE! Time Signal Sync on October 14, 2026.

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