Clock Stamp vs AlphaTime
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clock Stamp
This app displays multiple city time zones on a single, elegant clock face. It provides visual context for day, night, and weather in each location, aiding in travel planning and international communication.
- Multiple city time zones
- Visual analog world clock
- Local time difference display
- Weather and day/night context
- 12-hour and 24-hour modes
- Light and dark appearance
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Clock Stamp makes world time easy to read. See the time in several cities at once on one elegant dial, and check time differences, whether it's day or night, and the local weather at a glance. • Dial: every city sits on the dial, so time differences and daylight are clear at a glance • City search: search Apple Maps for cities and towns worldwide, and add as many as you like • Local Time: follows your location, or uses your phone's time zone • Weather: local weather at a glance, with backgrounds and weather effects that follow each city's time and weather • iPhone Duo: controls within reach of your thumb on both displays, and a live map of Earth showing day and night when it's open • 12/24-hour dial, Light/Dark appearance, Celsius/Fahrenheit, two text sizes • Six languages: English, 简体中文, Français, Italiano, 日本語, 한국어 • Supports VoiceOver and Reduce Motion Made for working across borders, remote meetings, planning trips, studying abroad, and keeping in touch with friends and family in other time zones.
AlphaTime
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AlphaTime makes it simple to see, compare, and convert time around the world. Whether you're working with international teams, staying connected with family and friends, traveling, or planning across time zones, AlphaTime puts the world's time zones into one clear, intuitive view. Free Features • View the current and chosen by you time across multiple locations • Start with four default cities: New York, London, Tokyo, and Sydney • Pick a specific hour and minutes and see the corresponding time in every city • Choose the exact 5-minute interval you need • Convert time automatically across time zones • View live analog clocks • Choose 12-hour or 24-hour time formats AlphaTime Premium Unlock the full AlphaTime experience with an optional auto-renewable subscription. Premium includes: • Add new cities • Edit saved cities • Delete cities • Reorder your city list • Choose a saved city as your Reference City to convert time from any location in the world • Use the Time Strip to select a time in your Reference City and see that same moment across all your saved cities • Control the Return to Current Time behavior Subscription AlphaTime Premium includes a 1-month free introductory offer, followed by USD $0.99/month. Subscription availability and pricing may vary by region. You can cancel at any time through Apple's subscription management. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is in-app purchases: Clock Stamp at none against AlphaTime's 1. Clock Stamp also leads on update cadence (every 2 days vs fortnightly). AlphaTime's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.2). On price and ads 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. AlphaTime sells 1 in-app purchase, starting at $0.99 per month. Clock Stamp asks for nothing beyond the download.
Clock Stamp ships an update every 2 days, AlphaTime fortnightly. Both last shipped on October 31, 2026.
| Parameter | Clock Stamp | AlphaTime |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.2 | 15.1 — better |
| Further details — not scored | ||
| Size | 4 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Zhicheng Chen | JEN EVANS TRUSHEVSKA |
In-app purchases
Clock Stamp
No in-app purchases
AlphaTime
- AlphaTime Premium1 Month trial$0.991 Month








