Time Calibrator vs Winder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Calibrator
This utility app provides precise local time and date information by connecting to an atomic clock server in Switzerland. It utilizes quantum technology to transmit this data at the speed of light directly to compatible i-Atomic watches.
- Accurate global time and date
- Connects to Swiss atomic clock server
- Quantum technology data transmission
- Direct communication to i-Atomic watches
- Light signal synchronization
Read full descriptionHide full description
This app is designed for i-Atomic watches users Welcome to Time Calibrator! Time Calibrator has been specifically designed to deliver accurate time information to people all around the globe. The app connects automatically to the atomic clock server in Switzerland to display the exact local time and date. Through quantum technology, the information travels at the speed of light from the NTP server and is communicated directly to AtomTime i-Atomic watches via light signals.
Winder
This app provides highly accurate time synchronization with atomic time servers. It features beautifully crafted, animated watch dials and optional sound cues for precise timekeeping. Designed for watch enthusiasts, it prioritizes privacy with no data collection.
- Atomic time synchronization (NTP)
- Drift strip for device offset
- Continuous-sweep second hand
- Analog and digital display options
- 12 handcrafted, animated dial themes
- Optional countdown sound cues
- No data collection or tracking
Read full descriptionHide full description
Winder syncs to public NTP atomic time servers and shows you time you can trust, accurate to the millisecond. Open the app, read the time, set your watch. That's it. Built for collectors who care about the seconds. WHAT YOU GET Atomic time synchronization via NTP (NIST, PTB). The drift strip at the top of the screen shows your device's exact offset from atomic time. No guessing, no rounding. A continuous-sweep second hand that glides like a Spring Drive. Analog face, digital display, or both. Dauphine hands with a center ridge that catches light. Four bundled typefaces. Optional countdown sound cues (mechanical or electronic) so you can set your crown without watching the screen. 12 dial themes drawn from real watch materials: meteorite with Widmanstätten crystal lines, aventurine glass with 1,375 shimmering inclusions, sunburst rays with a rotating specular beam, tapisserie grids, black ceramic waves, and more. Every surface animates. Light sweeps slowly across crystal boundaries. Inclusions catch and release a migrating glow. Specular beams rotate over hours. These are not wallpapers. They are living dial surfaces. Three themes are free. Winder Pro unlocks the full collection with a single purchase. No subscription. PRIVACY Winder collects no data. No accounts. No analytics. No tracking. No crash reporting. Your preferences stay on your device. The only network request is the NTP time sync. That's the entire privacy policy. BUILT BY A WATCH COLLECTOR I couldn't find a precision clock on the phone that felt worthy of the watches it was meant to serve, so I built one. Every dial, every animation, every pixel is crafted with the same care you'd expect from the watches Winder serves. Made in Mexico. Part of the Watchdex ecosystem. watchdex.app
Screenshots
Verdict
The clearest difference is review sentiment: Winder at 100% against Time Calibrator's 33%. Winder also leads on rating (5.0 vs 2.7) and update cadence (every 5 days vs every 8 months). Time Calibrator's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On price, ratings volume 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. Winder sells 1 one-off in-app purchase. Time Calibrator asks for nothing beyond the download.
Winder holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 33% of Time Calibrator's written reviews are positive against 100% of Winder's.
Time Calibrator ships an update every 8 months, Winder every 5 days. The most recent releases landed on August 24, 2026 and September 9, 2026 respectively.
| Parameter | Time Calibrator | Winder |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 8 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 8 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Atomtime Suisse S.A. | IVAN ALEJANDRO MUNGUIA CRUZ |
Customer experience
Time Calibrator
Winder
In-app purchases
Time Calibrator
No in-app purchases
Winder
- Winder Pro$4.99
Questions
Is Time Calibrator free?
Is Winder free?
Which has better reviews, Time Calibrator or Winder?
Do Time Calibrator or Winder have ads?
Which is updated more often, Time Calibrator or Winder?
Other comparisons
