Comparison

CatchPDF vs Kairox

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

Head to head
About

CatchPDF

Features
Read full description

CatchPDF is your all-in-one AI-powered document management hub. Convert photos, notes, and text into perfect PDF files in seconds. Whether you're a student or a business professional, boost your productivity with CatchPDF's next-generation tools. AI-POWERED FEATURES • AI Doc Builder: Simply describe what you need, and the AI will draft contracts, reports, or letters and turn them into professional PDFs instantly. • Chat with PDF: No time to read a long file? Ask your PDF questions and get summaries, key points, and extracted tables in seconds. SMART SCANNER & OCR • Document Scanner: Scan your receipts, invoices, or contracts in high quality using your device's camera. • Precise OCR: Extract text from scanned documents, copy it, or translate it. • Business Card Scanner: Scan business connections and directly save contacts to your phone. POWERFUL PDF EDITING • Merge & Split: Separate pages or combine different files into one. • Sign & Watermark: Digitally sign your documents or add custom text watermarks. • Encrypt: Protect your sensitive PDFs with secure passwords. • Reorder & Rotate: Easily change page order with drag and drop. • Compress: Reduce large PDF sizes to save space without losing quality. • Converters: Image to PDF, Word to PDF, Excel to PDF, and more. TOKEN SHOP & PREMIUM SUBSCRIPTION CatchPDF offers flexible models tailored to your needs: • Premium Subscription: Enjoy unlimited document creation, ad-free experience, and unrestricted access to all AI tools with a Monthly or Yearly plan. Save big with the annual option! • Token System (Pay-As-You-Go): Don't want a subscription? Just pay for what you use! Buy "Tokens" from the Token Shop to use AI tools, OCR, and advanced document converters whenever you need them. Your tokens never expire! Download CatchPDF now and experience the AI revolution in mobile document management! Terms of Use: https://catchpdf.app/terms.html Privacy Policy: https://catchpdf.app/privacy.html

About

Kairox

This app helps you build healthy hydration habits through smart tracking, reminders, and gamified wellness. Log water and electrolytes, build streaks, and unlock achievements with a virtual whale companion. Access requires a subscription or lifetime membership.

Highlights
  • Hydration tracking
  • Electrolyte logging
  • Streak building & achievements
  • Smart reminders
  • Whale companion gamification
  • History & insights
  • Apple Health integration
Read full description

Kairox Kairox is a screen time and digital wellness app designed to help you break doomscrolling habits by making distracting apps something you unlock, not something you open automatically. Choose the apps that waste the most time, complete exercises like push-ups, squats, or lunges, and earn a limited amount of access. Kairox helps you interrupt mindless scrolling, move more throughout the day, and use social media more intentionally. Kairox requires an active subscription to access and use the app. There is no free version or permanently free content. SUBSCRIPTIONS Kairox offers the following subscription options: Monthly Subscription Provides full access to all Kairox features with a recurring monthly subscription. Yearly Subscription Provides full access to all Kairox features with a yearly subscription and includes a 3-day free trial. If you do not cancel before the trial ends, the full yearly subscription price will be charged automatically. FEATURES INCLUDED WITH ALL SUBSCRIPTIONS BLOCK DISTRACTING APPS Select the social media and entertainment apps that distract you most. Kairox uses Apple’s Screen Time and Family Controls features to restrict access to the apps you choose. MOVE TO UNLOCK Complete push-ups, squats, or lunges to regain access to selected apps. Instead of receiving unlimited access, you unlock a specific amount of time before the restriction returns. CAMERA-BASED REP COUNTING Use your device’s camera during an active movement session so Kairox can recognize supported exercises and count completed repetitions. CUSTOM EARNING RULES Choose your exercise, set the number of required repetitions, and decide how much app access each completed session earns. BUILD STREAKS AND TRACK PROGRESS Stay consistent with streaks, milestones, exercise history, unlock history, and progress tracking. SCREEN TIME INSIGHTS Review your app usage, completed movement sessions, unlocked time, and long-term progress to better understand your habits. REMINDERS AND NOTIFICATIONS Receive exercise reminders, unlock alerts, streak updates, and notifications when your earned access is about to end. PERSONALIZED APP CONTROLS Choose which apps are restricted and adjust your movement, access, and notification preferences at any time. HOW IT WORKS Choose the apps you want Kairox to restrict. Select push-ups, squats, or lunges. Complete the required number of repetitions. Unlock a set amount of app access. When the earned time expires, the selected apps are restricted again. Complete another movement session whenever you want to regain access. PURCHASE DETAILS Payment is charged to your Apple ID at confirmation of purchase. Monthly subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. Yearly subscriptions include a 3-day free trial. If you do not cancel before the trial ends, the full yearly subscription price will be charged automatically. Your account will be charged for renewal within 24 hours before the end of the current subscription period. You can manage or cancel your subscription at any time through your App Store account settings. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kairox-website-one.vercel.app/privacy

Screenshots

CatchPDF4 screens
Kairox4 screens

Verdict

The call

The clearest difference is update cadence: CatchPDF at every 2 days against Kairox's every 4 days. CatchPDF also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases 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. CatchPDF sells 5 in-app purchases, starting at $3.99 per month and Kairox sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CatchPDF ships an update every 2 days, Kairox every 4 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
CatchPDF versus Kairox: the parameters behind the verdict, then further details
ParameterCatchPDFKairox
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 2 days — betterEvery 4 days
AdsNoNo
In-app purchasesYesYes
Monetization—Subscription
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size103 MB18 MB
Age rating4+12+
Developerhasan cemre kaplanSofia Marin

In-app purchases

5 purchases

CatchPDF

Subscriptions2
  • Monthly Premium$3.991 Month
  • Annual Premium$29.991 Year
One-time3
  • 100 Tokens$4.99
  • 200 Tokens$7.99
  • 300 Tokens$9.99
2 purchases

Kairox

Subscriptions1
  • Monthly Pro7 Days trial$5.991 Month
One-time1
  • Lifetime Pro$14.99

Questions

Is CatchPDF free?
CatchPDF is free to download, with in-app purchases available.
Is Kairox free?
Kairox is free to download, with in-app purchases available.
Do CatchPDF or Kairox have ads?
Neither CatchPDF nor Kairox shows ads.
Which is updated more often, CatchPDF or Kairox?
CatchPDF ships an update every 2 days, and Kairox every 4 days. Most recently, CatchPDF was updated on November 5, 2026 and Kairox on October 31, 2026.

Other comparisons