Chime vs GMT Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chime
Set personalized alerts and time announcements with customizable sounds and repeat intervals. Features include night mode and automatic weekend disabling for uninterrupted rest.
- Personalized alerts
- Flexible chime intervals
- Preference saving
- Night mode
- Customizable time ranges
- Do Not Disturb on weekends
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Time Announcements & Alerts Chime is a versatile app that allows you to set personalized alerts and time announcements on your iOS device. Customize alert sounds, choose repeat intervals, enable night mode for restful sleep, and automatically disable alerts on weekends. Key Features: • Personalized Alerts • Flexible Chime Intervals • Preference Saving • Night Mode • Customizable Time Ranges • DND on Weekends Download Custom Chime now to enhance your time management with cheerful alerts and timely reminders on your iPhone. Stay on track and never miss a beat!
GMT Time
This app provides accurate GMT time using NTP protocol and TrueTime framework. It offers a timekeeping function, allows setting time between two locations for itineraries, and supports multiple languages. Enjoy precise timekeeping with 1/100 second accuracy.
- Accurate GMT time display
- NTP and TrueTime framework integration
- Timekeeping function (on/off)
- Set time between two locations
- Multi-language support (English, Japanese, Chinese, Cantonese)
- 1/100 second accuracy
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NEW IN 1.2: SIMPLE MODE AND MINUTE REPEATER Tap the accessibility icon at the top right of Settings to switch to Simple mode. Local time, manual announcements and settings are on one page. Schedule time windows by weekday with half-hourly or hourly announcements. MINUTE REPEATER GUIDE 1. Choose vibration separately for normal and Silent modes, and whether voice should play in Silent mode. 2. Set Vibration frequency and try the preview. Hourly is the default. Start the announcer to run vibration on its own schedule. 3. Count hours, quarters and remaining minutes, in that order, using a 12-hour clock. At 3:37: 3 long pulses, 2 long-short pairs, 7 short pulses. Each quarter represents 15 minutes. Bell previews use low tones for hours, high-low pairs for quarters and high tones for remaining minutes. Vibration requires a supported iPhone; the feel varies by device and foreground/background state. Background patterns use strong-weak pairs. Background use requires Pro Lock Screen announcements and depends on system and app state. Stopping announcements or entering quiet hours stops scheduled vibration; in-app mute stops sound only. Foreground manual announcements and bell previews can play in Silent mode. Time117 brings network time synchronization, spoken announcements, world clocks and watch records together for everyday timekeeping, travel and collecting. • Spoken time: start or stop announcements, adjust speech speed and signal sounds, and set quiet hours. • World time: choose home and destination zones, share times and set alarms. • Clock views: themes, a large desk clock, widgets and Siri shortcuts. • Watch accuracy: track one watch for free, record offsets and view daily-rate trends. • Acoustic estimates: record mechanical watch ticks with the microphone. When the signal is sufficient, see beat-rate and daily-rate estimates during recording, then confirm and save the full measurement. • Watch standards: explore reference information and official source links. Time117 Pro is a one-time lifetime purchase. It unlocks background and Lock Screen announcements, hourly and custom intervals, ad removal, multiple-watch tracking, and editing collection photos, purchase details and service records. Purchases can be restored. Background announcements support Live Activities and the Dynamic Island on compatible iPhone models. Available in English, Japanese, Traditional and Simplified Chinese, Korean, Spanish, French, German, Brazilian Portuguese, Russian and Indonesian. Collection records and photos stay on your device; there is no built-in cloud sync. Service dates do not schedule reminders. Network time accuracy depends on network and device conditions. Acoustic results are estimates affected by the environment, placement and phone audio clock; they do not replace a professional timegrapher or certification.
Screenshots
Verdict
The clearest difference is rating: GMT Time at 4.7 against Chime's 4.2. Chime's advantage is in-app purchases (none vs 1) and ads (none vs shown). 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. GMT Time sells 1 one-off in-app purchase. Chime asks for nothing beyond the download.
GMT Time holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Chime has 820 ratings behind it against 38, so its average is the more settled of the two.
Chime ships an update every 5 months, GMT Time every 28 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.
| Parameter | Chime | GMT Time |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (820 ratings) | 4.7 (38 ratings) — better |
| Positive reviews | 45.3% of reviews | — |
| Number of ratings | 820 — better | 38 |
| Update frequency | Every 5 months — better | Every 28 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 19 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Reeba Sebastian | MingChun Chien |
Customer experience
Chime
GMT Time
Bugs and requests
Chime
Reported bugs
4 issues- Chime not working after iOS updates
- Can't change Do Not Disturb settings
- Inconsistent behavior across devices
- Setup process gets stuck
Requested features
5 requests- Add custom sound options
- Allow adjusting chime volume
- Provide option to disable ads
- Expand chime interval options
- Add Apple Watch support
GMT Time
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Chime
No in-app purchases
GMT Time
- Time117 Pro$0.99









