Comparison

Sentarm vs PDF Scan

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

Head to head
About

Sentarm

This smart alarm assistant simplifies setting alarms for complex and rotating schedules. It offers holiday recognition, custom calendars, and a minimalist interface for ease of use. Widgets, dark mode, and multi-language support enhance the user experience.

Highlights
  • Customizable work schedule alarms
  • Automatic holiday and special date skipping
  • Multiple regional and custom calendars
  • Convenient alarm and calendar widgets
  • Dark mode and multi-language support
Features
Read full description

Sentarm is your smart and flexible alarm assistant. Working alternate weeks, rotating shifts, or a custom schedule? Sentarm handles even the most complex routines with ease. Designed with a minimalist UI and intuitive interactions, setting alarms becomes simple and pleasant. Built-in holiday recognition means no more being startled awake on holidays — or forgetting to turn alarms back on. If the system alarm isn’t cutting it, Sentarm might just be the better choice. === Feature === 1. Set alarms that match your personal work schedule. 2. Smartly skip alarms on holidays and adjust for special dates. 3. Choose from multiple regional built-in calendars, or create your own custom calendar. 4. Convenient widgets for viewing alarms and calendars. 5. Dark mode and multi-language support. More features are on the way — we’d love to hear your ideas! If you enjoy Sentarm, please leave us a 5-star rating on the App Store! === Contact === Email: sentarm_app@outlook.com

About

PDF Scan

This app transforms your iPhone into a powerful document scanner. Quickly capture and digitize documents, receipts, and business cards, creating high-quality PDF files. Organize, manage, and share your scans with ease, with advanced features available via subscription.

Highlights
  • Scan documents instantly
  • Automatic edge detection and cropping
  • High-quality PDF creation
  • Multi-page scanning
  • Document management tools
  • Share and export scans
Features
Read full description

PDF Scan – Scanner & Reader turns your iPhone into a fast, private document scanner for everyday paperwork. Scan receipts, invoices, contracts, notes, IDs, forms, books, whiteboards and business cards in seconds, then save clean PDF files or image exports from one simple app. Built for real work Use PDF Scan when you need a portable scanner at home, in the office, on the road, at school or while traveling. Capture a page, review the result, organize it into a project and export it when you are ready. The app is designed for people who want a scanner that is quick, clear and practical without forcing an account or sending private documents through a cloud service. Clean scans from your camera Smart edge detection helps frame the page automatically. Perspective correction straightens angled shots, and automatic image enhancement adjusts shadows, contrast and sharpness so documents are easier to read. Use it for paper forms, printed letters, handwritten notes, receipts, class handouts, meeting documents and signed pages. PDF tools in one place Create multi-page PDFs, reorder pages, save projects, export smaller or higher quality PDF files, and share documents through the standard iOS share sheet. You can also save pages as images, keep original images when needed, add a watermark, sign a document and place the signature on the page. For sensitive files, use PDF lock tools to help protect a document with a password before sharing. Text recognition and smart tools OCR text recognition helps pull editable and searchable text from scans, so you can copy, review and share the words inside a document instead of retyping everything. Business card scanning can recognize contact details and help save them to Contacts. Receipt and invoice tools can extract useful fields and export line items as CSV for expense tracking. Organize paperwork without a mess Keep different scans in separate projects: tax documents, school notes, rental papers, travel receipts, work contracts, medical forms, invoices, business cards, warranties and signed agreements. A project-based library makes it easier to find what you scanned, add more pages later and export the right file when someone asks for it. Privacy-first scanning PDF Scan is built around five practical privacy promises: Offline: core scanning, organizing, OCR, PDF creation and export workflows can be used without depending on a web account. No Login: open the app and scan; no sign-up, no user profile and no password just to manage your own documents. Privacy First: receipts, IDs, contracts, signatures, business cards and personal notes are treated as private files. On Device: document capture, image processing, OCR, PDF generation, signatures and exports are handled on your device. No Cloud Upload: PDF Scan does not upload your scans, recognized text, contacts, receipts, signatures or projects to its own cloud. For students, freelancers, small business owners, travelers, teachers, parents and anyone with paper to manage, PDF Scan keeps the workflow simple: scan, review, recognize, sign, convert and share. Some advanced tools and unlimited access may require an active subscription, clearly shown before purchase. Privacy Policy https://5gotogo.github.io/PDFScan-privacy/privacy-policy.html Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Sentarm4 screens
PDF Scan4 screens

Verdict

The call

The clearest difference is review sentiment: PDF Scan at 100% against Sentarm's 50%. PDF Scan also leads on rating (5.0 vs 4.2) and iOS requirement (16.6 vs 26.0). Sentarm's advantage is update cadence (weekly vs every 2 months). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sentarm sells 4 one-off in-app purchases and PDF Scan sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

PDF Scan holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 50% of Sentarm's written reviews are positive against 100% of PDF Scan's.

UpkeepUpdate frequency

Sentarm ships an update weekly, PDF Scan every 2 months. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

Scorecard4 real differences · 6 level
Sentarm versus PDF Scan: the parameters behind the verdict, then further details
ParameterSentarmPDF Scan
PriceFreeFree
Rating4.2 (5 ratings)5.0 (3 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings5 — better3
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad — betteriPhone
Requires iOS26.016.6 — better
Further details — not scored
Size45 MB3 MB
Age rating4+4+
Developer永康 梁家宝 戴

Customer experience

Sentarm

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

PDF Scan

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Sentarm

One-time4
  • Custom SoundFree
  • Custom Calendar$0.99
  • Widgets$0.99
Show 1 more
  • Missions$1.99
2 purchases

PDF Scan

Subscriptions2
  • PDFScan Pro Monthly3 Days trial$4.991 Month
  • PDFScan Pro Yearly3 Days trial$39.991 Year

Questions

Is Sentarm free?
Sentarm is free to download, with in-app purchases available.
Is PDF Scan free?
PDF Scan is free to download, with in-app purchases available.
Which has better reviews, Sentarm or PDF Scan?
PDF Scan is rated higher. Sentarm averages 4.2 out of 5 from 5 ratings, while PDF Scan averages 5.0 from 3 ratings.
Do Sentarm or PDF Scan have ads?
Neither Sentarm nor PDF Scan shows ads.
Which is updated more often, Sentarm or PDF Scan?
Sentarm ships an update weekly, and PDF Scan every 2 months. Most recently, Sentarm was updated on October 5, 2026 and PDF Scan on September 30, 2026.

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