Comparison

Compress PDF vs Accelerometer

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

Head to head
About

Compress PDF

Easily reduce the size of PDF files for efficient storage and sharing. Offers adjustable quality levels and on-device processing for privacy. An optional Pro upgrade provides unlimited compressions, target file size control, and an ad-free experience.

Highlights
  • Compress PDFs by adjustable quality
  • Reduce PDF file size quickly
  • Preview original vs. compressed size
  • Share or save compressed PDFs
  • Private and secure on-device processing
  • Target file size control (Pro)
  • Unlimited compressions (Pro)
Read full description

Compress PDFs and make PDFs smaller easily. Optimize PDFs for storage and sharing. Need to format a document for printing, work, or official submission? Resize PDF pages to A4, Letter, Legal, Tabloid, A3, and Custom Dimensions. Features: • Adjustable Quality: Use a simple slider to balance file size • Target Size: Set a goal size • Live Preview: Compare original vs. compressed file size instantly • Quick Share: Easily save to Files or share via email and messages • Smart Document Scanner: Capture and crop documents cleanly right from your camera • Photos to PDF: Convert your images and photos directly into a clean PDF document • Quick Text Creator: Convert plain text typed on your keyboard directly into flat, print-ready text documents • Advanced Organizer: Merge separate files together or cleanly extract specific pages into a new document • Live Text OCR: Instantly lift editable text directly out of captured images • PDF Markup: Annotate documents by drawing, highlighting, and adding text directly to the page PDFs are flattened during export. Text, links, and bookmarks will no longer be selectable. Free users: • Standard PDF Compression (1 per day) • Standard A4 Resizing (1 per day) • Photos to PDF conversion (1 per day) • Quick Text to PDF documents (1 per day) • PDF Markup & Annotation tools (1 per day) Premium unlocks: • Target File Size mode (specify KB/MB) • Merge separate PDFs together • Extract specific pages into a new file • Live Text OCR Extraction • Custom Page Sizer & All Page Formats • No Daily Limit Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shotexstudio.com/compress-pdf-resize-pdf/ On-Device Processing: Private and secure—no files ever leave your phone.

About

Accelerometer

Features
Read full description

Accelerometer turns your phone into a precision motion meter. See exactly how your device moves on every axis, in real time, with smooth live charts and instant RMS readings. KEY FEATURES • Live X, Y, Z axis tracking — watch acceleration update in real time as your device moves • Vector magnitude view — switch from per-axis charts to combined magnitude display in one tap • Last & Peak RMS readouts — never miss the maximum value during a session • Configurable units — read values in g or m/s² to match your workflow • Save sessions — capture any measurement and keep it in your History for later • History detail view — re-open any saved session with full chart snapshot and numeric breakdown • Search & rename — find past sessions fast and label them however you want • Share & export — send measurements as image, plain text, or .txt file to anyone • Multi-select — share or delete several past sessions at once • Clean, dark-themed interface — easy to read in workshops, labs, or in the field WHO IT'S FOR • Engineers and technicians measuring machine vibration on the go • Carpenters, woodworkers, and DIYers checking tool balance • Drivers logging ride quality or suspension behavior • Students and educators demonstrating physics concepts • Curious tinkerers who want to see what their phone is actually feeling PRIVACY FIRST All measurements stay on your device. Nothing is uploaded, nothing is tracked beyond what's needed to keep the app working. You stay in control. — Accelerometer app is free. You can use it forever, at no cost. However, Accelerometer does offer premium features for its subscribers. If you decide to purchase an upgrade, you will unlock additional features. Terms of Use: https://kociapp.github.io/Accelerometer/term-of-use Privacy Policy: https://kociapp.github.io/Accelerometer/privacy-policy

Screenshots

Compress PDF3 screens
Accelerometer4 screens

Verdict

The call

The clearest difference is ads: Compress PDF at none against Accelerometer's shown. On price, in-app purchases, device support and iOS requirement 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. Compress PDF sells 3 in-app purchases, starting at $2.99 per 7 days and Accelerometer sells 4 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Compress PDF versus Accelerometer: the parameters behind the verdict, then further details
ParameterCompress PDFAccelerometer
PriceFreeFree
Rating4.7 (14 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings14 — better—
Update frequencyFortnightly—
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.616.0 — better
Further details — not scored
Size7 MB12 MB
Age rating12+4+
DeveloperPremiumAl LimitedAndy Sutanto

In-app purchases

3 purchases

Compress PDF

Subscriptions1
  • Premium Weekly$2.997 Days
One-time2
  • Premium$4.99
  • Premium$5.99
4 purchases

Accelerometer

Subscriptions3
  • 1W$3.997 Days
  • 1M$7.991 Month
  • 1Y3 Days trial$29.991 Year
One-time1
  • Pro$49.99

Questions

Is Compress PDF free?
Compress PDF is free to download, with in-app purchases available.
Is Accelerometer free?
Accelerometer is free to download, with in-app purchases available.
Do Compress PDF or Accelerometer have ads?
Accelerometer shows ads; Compress PDF does not.

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