Comparison

Opus vs ZenClock

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

Head to head
About

Opus

Features
Read full description

Focus. Unlock a masterpiece. Opus is a free, unlimited Pomodoro focus timer that turns completed sessions into a museum of your own. Finish a focus session to unlock the next artwork in a curated journey — a public-domain masterpiece from The Metropolitan Museum of Art or the Cleveland Museum of Art, accompanied by a short museum-style story. FOCUS, THEN DISCOVER Start a session, stay with your work, and leave with something worth keeping. Every completed focus session reveals the next artwork in your journey. The sequence is curated, so your museum grows with purpose rather than at random. CHOOSE YOUR JOURNEY Begin as The Explorer with 15 artworks across 3 wings. Continue as The Curator with 30 artworks across 5 wings, or become The Master Collector with 60 artworks across 8 wings. Watch each room fill as your focus practice grows. THE TIMER IS FREE — ALWAYS Focus without session limits, locked breaks, ads, or a countdown to a paywall. Choose the rhythm that fits your day: • Classic — 25/5/15 • Ultra Focus — 50/10/20 • Quick Study — 15/3/10 A long break begins automatically after four completed sessions. YOUR MUSEUM Explore unlocked artworks room by room, mark favorites, and read the story behind every piece. Artworks you have not reached remain hidden as silhouettes, so every unlock stays a discovery. TASKS, STREAKS & FOCUS HISTORY Add what you are working on, connect it to a focus session, and see where your time went. Follow your streaks, weekly and monthly charts, and a full year of focus history. QUIET BY DESIGN Warm light and dark themes, a distraction-free Zen Mode, optional completion sounds, and a notification when time is up. No feed. No ads. No noise. FREE & OPUS PRO The unlimited focus timer, tasks, statistics, the Museum, and The Explorer's first wing with 5 artworks are free. Opus Pro unlocks the rest of The Explorer and the complete Curator and Master Collector journeys. PRIVACY No account or sign-up is required. Your sessions, tasks, and collection stay on your device, with full backup export and import. Opus uses anonymous, aggregated usage analytics to improve the experience. Artwork images are delivered from the museums' open-access services, so discovering a new piece requires an internet connection. App languages: English, Turkish, Spanish, German, and French — including artwork stories. Start your next focus session. Leave with a masterpiece. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://tugrul.works/projects/opus/privacy-policy

About

ZenClock

Features
Read full description

Make room for one thing that matters. ZenClock is a calm focus timer and lightweight daily planner designed to make starting easier and progress visible. FOCUS WITHOUT CLUTTER • Start a focus session in a few taps • Use free 10, 20, 25, 50, or 90-minute quick lengths • Unlock any custom duration from 1 minute to 4 hours with Pro • Use a gentle start ritual and local timer reminders • Return safely after locking your screen or leaving the app PLAN A LIGHTER DAY • Create up to three intentional plans each day for free • Unlock unlimited Today plans with Pro • Repeat tasks on the days that fit your rhythm • Keep unfinished work visible without punishment CHOOSE HOW FOCUS FEELS • Morning Dawn is always free • Earn Stars through real focused time and redeem them for Rain or Mist • Stars are never sold for money • Pro opens Golden, Moonlit Lake, Autumn Grove, Coastal Dawn, Snow Lanterns, Lavender Dusk, Bamboo Rain, Starlit Dunes, and future Pro additions SEE USEFUL PATTERNS • Review seven-day focus insights for free • Unlock four-week trends and period comparisons with Pro • Keep your history, focused time, and earned Stars without Pro ZENCLOCK PRO ZenClock Pro unlocks custom timing, unlimited daily plans, eight immersive atmosphere scenes with matching motion and soundscapes, four-week insights, and future Pro additions. Choose monthly, yearly, or a one-time lifetime purchase. All three options unlock the same Pro features. Core focus timing, five quick lengths, three daily plans, earned Star scenes, and seven-day insights remain free. ZenClock works without an account, and your focus data stays on your device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Opus4 screens
ZenClock4 screens

Verdict

The call

The clearest difference is update cadence: ZenClock at every 6 days against Opus's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Opus sells 6 in-app purchases, starting at $4.99 per month and ZenClock sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Opus ships an update every 6 months, ZenClock every 6 days. The most recent releases landed on September 9, 2026 and September 15, 2026 respectively.

Scorecard1 real difference Ā· 5 level
Opus versus ZenClock: the parameters behind the verdict, then further details
ParameterOpusZenClock
PriceFreeFree
Update frequencyEvery 6 monthsEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.0
Further details — not scored
Size57 MB22 MB
Age rating4+4+
DeveloperTugrul Erdem DogruBeijing Meng Gu Li Net Technology Co.,Ltd.

In-app purchases

6 purchases

Opus

Subscriptions2
  • Collector Edition (Monthly)7 Days trial$4.991 Month
  • Collector Edition (Yearly)7 Days trial$19.991 Year
One-time4
  • American Realism$2.99
  • Surrealism$2.99
  • Abstract Art$2.99
Show 1 more
  • Opus Pro: Collector Lifetime$29.99
3 purchases

ZenClock

Subscriptions2
  • ZenClock Pro Monthly$1.991 Month
  • ZenClock Pro Yearly$9.991 Year
One-time1
  • ZenClock Pro Lifetime$14.99

Questions

Is Opus free?
Opus is free to download, with in-app purchases available.
Is ZenClock free?
ZenClock is free to download, with in-app purchases available.
Do Opus or ZenClock have ads?
Neither Opus nor ZenClock shows ads.
Which is updated more often, Opus or ZenClock?
Opus ships an update every 6 months, and ZenClock every 6 days. Most recently, Opus was updated on September 9, 2026 and ZenClock on September 15, 2026.

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