Comparison

PDF Fox vs Electronics Reference Toolkit

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

Head to head
About

PDF Fox

This comprehensive toolkit offers a suite of PDF management features, including editing, scanning, signing, and conversion. It prioritizes user privacy by operating entirely offline, ensuring your documents remain on your device without requiring accounts or subscriptions.

Highlights
  • Offline PDF editing
  • OCR text recognition
  • Secure PDF signing
  • Document scanning
  • PDF merging and splitting
  • File compression
  • Password protection
Features
Read full description

PDF Fox Pro: Professional PDF Tools All your PDF needs in one app! PDF Fox Pro is a privacy-focused PDF toolkit that works entirely offline. Your files never leave your device, ensuring total privacy and security. No accounts, no subscriptions, no cloud—just pure power in your pocket. NEW IN VERSION 2.0.0 • PDF Editor (Beta) - Zoom, rotate, delete pages, and add annotations • OCR Text Recognition (Beta) - Convert scans to searchable text (English, Turkish, Arabic, and more) • PDF Signing - Sign documents securely with certificates or hand-drawn signatures • Metadata Editor - Edit Title, Author, Subject, and Keywords • Smart Text Search - Find text easily even in scanned images via OCR • 20 Languages Support - Now fully localized for a global experience ALL PDF TOOLS IN ONE APP: • PDF Editor (Beta) - Edit text, add shapes, highlight, and annotate • OCR Text Recognition (Beta) - Convert scans to searchable text • High-Quality Scanner - Scan docs with auto-edge detection & filters • PDF Signing - Use .p12 certificates, draw, or type your signature • Form Filler - Automatically detect and fill interactive forms • Metadata Editor - Edit Title, Author, Subject, and Keywords • Merge PDF - Combine multiple PDF files into one • Split PDF - Extract pages or divide documents • Compress PDF - Reduce file size (Smart & Standard modes) • Organize Pages - Reorder, delete, or management layouts • Rotate PDF - Rotate individual pages or the whole document • PDF to Images - Convert pages to high-quality JPG/PNG • Images to PDF - Create professional PDFs from your photos • Protect PDF - Add passwords and set permissions (Print/Copy) • Unlock PDF - Remove password protection from your files • Add Watermark - Customize text, position, and opacity • Smart Search - Fast document-wide search (including OCR) • Page Grid View - Navigate large documents effortlessly PRIVACY & PERFORMANCE: • 100% Offline - No internet connection required • Files Stay Local - No files are ever uploaded to any server • No Account Required - Use all features without registration • Instant Processing - Optimized native modules for iOS • 10 Languages Support - Fully localized global experience PDF Fox Pro is a premium, ad-supported experience. No hidden fees or mandatory subscriptions.

About

Electronics Reference Toolkit

This app provides a comprehensive suite of tools for electronics calculations and reference. It includes calculators for resistors, LEDs, capacitors, and voltage dividers, along with a unit converter and transistor database. Designed for speed and offline use, it's ideal for students, hobbyists, and engineers.

Highlights
  • Resistor Calculator (4/5 band)
  • Ohm's Law Calculator
  • LED Resistor Calculator
  • Capacitor Decoder
  • Voltage Divider Calculator
  • Unit Converter
  • Transistor Reference
Features
Read full description

ElecKit is a lightweight electronics toolkit built for fast lookups and quick calculations—perfect for students, hobbyists, and engineers. Tools included - Resistor Calculator (4/5 band) + tolerance & range - Ohm’s Law (V/I/R/P) - LED Resistor Calculator (Vs, Vf, If) - Capacitor Decoder (3-digit & EIA codes) - Voltage Divider (2 or 3 resistors) - RC/RL Time Constant with charging curve & key points (1τ…5τ) - Unit Converter (Ω, F, H, Hz + prefixes) - Battery Life Estimator (battery type, load current, duty cycle) - Transistor Reference (NPN, PNP, MOSFET) with fast search & filters Notes * Designed for speed, clean UI, and offline use. * Reference values may vary by manufacturer—always confirm with the datasheet.

Screenshots

PDF Fox3 screens
Electronics Reference Toolkit4 screens

Verdict

The call

The clearest difference is update cadence: Electronics Reference Toolkit at fortnightly against PDF Fox's every 2 months. PDF Fox's advantage is device support (3 vs 1). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PDF Fox ships an update every 2 months, Electronics Reference Toolkit fortnightly. The most recent releases landed on September 20, 2026 and July 16, 2026 respectively.

Scorecard2 real differences · 8 level
PDF Fox versus Electronics Reference Toolkit: the parameters behind the verdict, then further details
ParameterPDF FoxElectronics Reference Toolkit
PriceFreeFree
Rating—4.9 (7 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—7 — better
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.6
Further details — not scored
Size43 MB7 MB
Age rating4+4+
DeveloperYasin KuyuHa Do Thi Thu

Customer experience

PDF Fox

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Electronics Reference Toolkit

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PDF Fox

No in-app purchases

None

Electronics Reference Toolkit

No in-app purchases

Questions

Is PDF Fox free?
PDF Fox is free to download, with no in-app purchases.
Is Electronics Reference Toolkit free?
Electronics Reference Toolkit is free to download, with no in-app purchases.
Do PDF Fox or Electronics Reference Toolkit have ads?
Neither PDF Fox nor Electronics Reference Toolkit shows ads.
Which is updated more often, PDF Fox or Electronics Reference Toolkit?
PDF Fox ships an update every 2 months, and Electronics Reference Toolkit fortnightly. Most recently, PDF Fox was updated on September 20, 2026 and Electronics Reference Toolkit on July 16, 2026.

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