Comparison

ReadiSync by Fatigue Science vs Clear Days

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

Head to head
About

ReadiSync by Fatigue Science

Features
Read full description

ReadiSync by Fatigue Science is a companion app for the Readi enterprise platform, designed to streamline the group syncing process of Readi wearable devices using an iPhone or iPad sync station. With ReadiSync, Readi program managers can: • Activate and pair Readi wearable devices to specific users • Automatically capture sleep data from nearby Readi devices via Bluetooth • Securely sync collected data to their organization's Readi platform Requirements: • A Readi account with Location Manager (or higher) access Supported Devices: • iPhones and iPads running iOS 13 or later

About

Clear Days

This app helps you track your progress in reducing or quitting alcohol consumption without judgment. It focuses on celebrating your sober days and provides tools to manage cravings and support your journey.

Highlights
  • Sober day tracking
  • Progress visualization
  • Money saved calculation
  • Cravings support tools
  • Private by default
  • Journaling and insights (premium)
Features
Read full description

Clear Days is a drink tracker and sober day counter for people who want to cut back, quit drinking, or stay alcohol free without shame. Whether you're drinking less, starting over, doing Dry January, or building long-term sobriety, this app helps you track progress in a kinder way. PROGRESS, NOT PUNISHMENT Most sobriety apps treat one slip like everything is gone. We don't. If you stayed sober 25 out of 28 days, that's 89% progress. Clear Days shows what you've built, not just what you broke. A DRINK TRACKER THAT FEELS HUMAN Track sober days, alcohol-free days, and daily progress with a simple calendar, quick stats, money saved, and check-ins that take seconds. No forced journaling. No lectures. No shame spiral. HELP WHEN CRAVINGS HIT Tap "I'm struggling" for immediate support: • Guided breathing • Your personal reasons for staying sober • A 15-minute timer to ride out the urge • One-tap access to your support person or crisis hotlines BUILT FOR QUITTING OR CUTTING BACK Whether your goal is no alcohol, fewer drinking days, or a full quit drinking journey, the app meets you where you are. Slip days are shown in gray as data to learn from, not punishment. PRIVATE BY DEFAULT Everything stays on your device. No accounts, no cloud sync requirement, no selling your data. Export your information anytime. FREE FOREVER CORE The core tracker is free forever, including: • Daily check-ins • Progress calendar • Sober day stats and money saved • Reminder notifications • Home screen widgets • Cravings support tools CLEAR DAYS+ If you want deeper reflection tools, Clear Days+ adds: • Journal history so you can revisit every note you've written • Insights to spot patterns in triggers, cravings, and difficult days • Shareable PDF progress reports for therapists, sponsors, or personal records Built with care by someone who gets it. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ReadiSync by Fatigue Science3 screens
Clear Days4 screens

Verdict

The call

The clearest difference is in-app purchases: ReadiSync by Fatigue Science at none against Clear Days's 3. ReadiSync by Fatigue Science also leads on iOS requirement (15.0 vs 18.6). Clear Days's advantage is update cadence (every 2 weeks vs monthly). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Clear Days sells 3 in-app purchases, starting at $1.99 per 7 days. ReadiSync by Fatigue Science asks for nothing beyond the download.

UpkeepUpdate frequency

ReadiSync by Fatigue Science ships an update monthly, Clear Days every 2 weeks. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 6 level
ReadiSync by Fatigue Science versus Clear Days: the parameters behind the verdict, then further details
ParameterReadiSync by Fatigue ScienceClear Days
PriceFreeFree
Rating—4.7 (7 ratings) — better
Number of ratings—7 — better
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.0 — better18.6
Further details — not scored
Size66 MB10 MB
Age rating4+17+
DeveloperFatigue ScienceCozy Paradise LLC

In-app purchases

None

ReadiSync by Fatigue Science

No in-app purchases

3 purchases

Clear Days

Subscriptions2
  • Clear Day Plus Weekly$1.997 Days
  • Clear Day Annual$29.991 Year
One-time1
  • Clear Day Plus Lifetime$49.99

Questions

Is ReadiSync by Fatigue Science free?
ReadiSync by Fatigue Science is free to download, with no in-app purchases.
Is Clear Days free?
Clear Days is free to download, with in-app purchases available.
Do ReadiSync by Fatigue Science or Clear Days have ads?
Neither ReadiSync by Fatigue Science nor Clear Days shows ads.
Which is updated more often, ReadiSync by Fatigue Science or Clear Days?
ReadiSync by Fatigue Science ships an update monthly, and Clear Days every 2 weeks. Most recently, ReadiSync by Fatigue Science was updated on November 11, 2026 and Clear Days on November 5, 2026.

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