Atomic Clock vs Stillr
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Atomic Clock
This utility provides highly accurate time synchronization using NTP. View precise time with millisecond detail, compare your device clock to network time, and customize display styles. It's privacy-focused with no tracking or analytics.
- NTP-based time synchronization
- Millisecond detail
- Local time and UTC display
- Offset and latency indicators
- Automatic sync
- Eight clock styles
- Customizable colors
- Privacy-focused
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Atomic Clock – Precision Time is a professional precision clock and NTP time synchronization utility for anyone who needs highly accurate time directly on their device. Use reliable network time synchronization to view precise time with millisecond-level detail. Compare your device clock with network time, check sync offset and latency, switch between local time and UTC, and keep the screen on when you need a stable reference clock. Key features: • NTP-based time synchronization • Millisecond or 1/60-second detail • Local time and UTC display • Device offset and network latency indicators • Automatic sync with configurable intervals • Eight clock styles: circular dots, analog, minimalist, binary, neon glow, flip clock, Nixie tubes, and orbital dial • Custom accent colors and multi-color display • Night mode and keep-screen-on option • Privacy-focused: no account, no analytics, no tracking Atomic Clock – Precision Time is built for precise timing, clock drift checks, latency awareness, and a clean daily precision clock. Privacy Policy: https://5gotogo.github.io/AtomicClock-privacy/privacy-policy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Stillr
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Stillr is a calm pomodoro study timer for exam prep, homework and deep focus. Press start, pick a sound, and study - no account, no ads, no streak guilt. Whether you want to study with rain, work in quiet, or just need a simple tomato timer that stays out of your way, Stillr keeps it minimal. FOCUS SESSIONS - Classic pomodoro: 25-minute focus rounds with 5-minute breaks - Fully customizable focus and break lengths - Long-break cycles after a set number of rounds - Session progress dots - see how far you've come - Optional task label to keep each session on track - Gentle chime between focus and break STUDY WITH RAIN & CALM SOUNDS - Rain, forest, white noise or silence - Sounds keep playing through your whole session - Screen stays on while you study BUILT FOR STUDENTS & DEEP WORK - Perfect for exam prep, revision, homework sprints and writing - Distraction-free interface - nothing to tap, nothing to dismiss - Works completely offline - Helpful for anyone who finds it hard to start, including people with ADHD WHAT STILLR WILL NEVER DO - Ask how productive you felt after every session - Force you to set a goal before you begin - Push you to share your stats with strangers - Nag you with streak notifications - Show you ads or upsell screens YOUR STATS, YOUR DATA - See your weekly focus hours at a glance - Simple bar chart - no gamification, no comparisons - All data stored locally on your device - No account required. No cloud. Just you, a timer, and the work in front of you. Privacy Policy: https://erkarslan.github.io/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Stillr at fortnightly against Atomic Clock's every 2 months. Stillr also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price, ads and in-app purchases 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 Clock sells 2 in-app purchases, starting at $5.99 per month and Stillr sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Atomic Clock ships an update every 2 months, Stillr fortnightly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Atomic Clock | Stillr |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (7 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | 家宝 戴 | ARZU ARSLAN |
In-app purchases
Atomic Clock
- AtomicClock Pro Monthly7 Days trial$5.991 Month
- AtomicClock Pro Monthly7 Days trial$19.991 Year
Stillr
- Stillr Plus$2.99









