Comparison

PDF Notes S vs Vibe Focus Flow

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

Head to head
About

PDF Notes S

This app offers a dual-page PDF viewer with smooth scrolling and fast page turns. It also provides document management, quick previews of various file types, and annotation tools. An upgrade removes ads and unlocks full functionality.

Highlights
  • Dual-page PDF viewer
  • Horizontal/vertical scroll and page turns
  • Document browser for file organization
  • Quick Look for various file types
  • ZIP file preview without unzipping
  • 8 handwriting tools
  • Cache manager for fast page turns
Read full description

PDF Notes S gives you a 2 pages viewer with horizontal/vertical scroll, and cache for fast page turns, and thumbnails scrollbar. PDF Notes S gives you ZIP Preview, Quick Look of documents, images, music, videos, and etc. PDF Notes S gives you Document Browser so that you can organize all your files very easily. PDF Viewer - 1 page or 2 pages, horizontal or vertical fast page turns - Scroll or page turns by tap on sides - 8 handwriting tools that you can adjust color and line width - Horizontal or vertical thumbnails scrollbar - PDF outlines, bookmarks, and annotations list - PDF search - Cache manager supports 3 modes, permanent cache, automatic cache, and no cache Quick Look, ZIP Preview - PDF, RTF, TEXT - iWork documents, Office documents - Images, Music, PiP Videos - Without Unzip, preview ZIP contents (password may be requested if locked) Advertisements before upgrade - Banner ads can be shown at the bottom - Interstitial ads can be shown per 30 minutes Information about the auto-renewable nature of the subscription - Payment will be charged to iTunes Account at confirmation of purchase. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. A link to privacy policy and terms of use - http://blog.musebook.com/2017/03/privacy-policy.html The length of the subscription - Monthly or Yearly NOTE: All content contained herein is subject to change without notice.

About

Vibe Focus Flow

This app creates a calm and immersive environment for focused work or study. It combines visual scenes and ambient sounds to help users transition into a state of flow. Ideal for deep work, studying, reading, or taking peaceful breaks.

Highlights
  • Pomodoro, countdown, and count-up focus modes
  • Cozy visual themes
  • Ambient background sounds
  • Minimalist interface
  • Visual-first focus experience
  • Optional premium themes and audio
Features
Read full description

Turn focus time into a calm ritual with immersive scenes, ambient sounds, and flexible timers for work, study, reading, and writing. Vibe Focus Flow helps you create a quieter place to begin. Choose Pomodoro, countdown, stopwatch, or Open Focus, select a visual scene, add ambient audio or white noise, and let your attention settle into a steady rhythm. START YOUR WAY • Pomodoro for structured focus and breaks • Countdown for a clear finish line • Stopwatch for open-ended sessions • Open Focus when you only want the atmosphere CREATE YOUR FOCUS SPACE • Switch between lofi-inspired visual scenes • Pair each session with ambient audio or white noise • Organize focus sessions by project • Review completed sessions in History • Go deeper with Statistics, unlimited projects, Pro ambient content, and iCloud Sync with App Pro FOR THE MOMENTS THAT MATTER • Deep work • Studying • Reading • Writing • Creative sessions • Quiet breaks Vibe Focus Flow is built around one simple idea: atmosphere -> focus -> flow. It does not push you to do more. It gives you a calmer place to start. Download Vibe Focus Flow and begin your next focus session. Statistics, iCloud Sync, unlimited projects, and Pro ambient content require App Pro. Availability may vary by plan and region. Privacy Policy: https://www.notion.so/morn/Privacy-Policy-355b9edc8b2b8051ab33e15922d5fdb8 Terms of Use: https://www.notion.so/morn/Terms-of-Use-and-End-User-License-Agreement-355b9edc8b2b801a8871d7d04f93e9b4

Screenshots

PDF Notes S4 screens
Vibe Focus Flow4 screens

Verdict

The call

The clearest difference is rating: Vibe Focus Flow at 5.0 against PDF Notes S's 4.2. Vibe Focus Flow also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 6 weeks). PDF Notes S's advantage is ratings volume (5 vs 1). On price, in-app purchases, monetization model 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. PDF Notes S sells 2 in-app purchases, starting at $0.99 per month and Vibe Focus Flow sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Vibe Focus Flow holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: PDF Notes S has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

PDF Notes S ships an update every 6 weeks, Vibe Focus Flow every 3 weeks. The most recent releases landed on October 7, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
PDF Notes S versus Vibe Focus Flow: the parameters behind the verdict, then further details
ParameterPDF Notes SVibe Focus Flow
PriceFreeFree
Rating4.2 (5 ratings)5.0 (1 ratings) — better
Positive reviews52.9% of reviews—
Number of ratings5 — better1
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size22 MB103 MB
Age rating4+4+
DeveloperAMuseTec Co., Ltd.晨 房

Customer experience

PDF Notes S

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews17 reviews
Positive52.9%
Neutral35.3%
Negative11.8%

Vibe Focus Flow

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

PDF Notes S

Subscriptions2
  • Monthly Plan$0.991 Month
  • Yearly Plan$9.991 Year
3 purchases

Vibe Focus Flow

Subscriptions2
  • Vibe Focus Pro Monthly$2.991 Month
  • Vibe Focus Pro Yearly7 Days trial$9.991 Year
One-time1
  • Vibe Focus Pro Lifetime$29.99

Questions

Is PDF Notes S free?
PDF Notes S is free to download, with in-app purchases available.
Is Vibe Focus Flow free?
Vibe Focus Flow is free to download, with in-app purchases available.
Which has better reviews, PDF Notes S or Vibe Focus Flow?
Vibe Focus Flow is rated higher. PDF Notes S averages 4.2 out of 5 from 5 ratings, while Vibe Focus Flow averages 5.0 from 1 ratings.
Do PDF Notes S or Vibe Focus Flow have ads?
PDF Notes S shows ads; Vibe Focus Flow does not.
Which is updated more often, PDF Notes S or Vibe Focus Flow?
PDF Notes S ships an update every 6 weeks, and Vibe Focus Flow every 3 weeks. Most recently, PDF Notes S was updated on October 7, 2026 and Vibe Focus Flow on October 23, 2026.

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