Comparison

Smart Tools Pro HD vs Smart Unit Conversion

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

Head to head
About

Smart Tools Pro HD

This app transforms your iPad into a comprehensive toolkit with over 30 measurement and utility functions. It offers tools like rulers, protractors, speedometers, flashlights, and QR code scanners, catering to various professional and personal needs.

Highlights
  • Ruler and protractor for precise measurements
  • AR-based distance and height measurement
  • Real-time speedometer with HUD mode
  • Flashlight with adjustable brightness
  • Digital compass with GPS integration
  • QR code scanner and generator
  • Spirit level with surface and edge modes
Features
Read full description

**Smart Tools Pro - Your Complete iOS Toolkit** Transform your iPad into a professional measurement and utility toolkit with Smart Tools Pro. Whether you're a DIY enthusiast, professional contractor, photographer, or just need quick access to essential tools, Smart Tools Pro has everything you need in one beautifully designed app - 30 powerful tools at your fingertips! MEASURING TOOLS (8) * Ruler - Measure objects with precision using your screen or camera. Perfect for quick measurements when you don't have a physical ruler. * Protractor - Measure angles accurately for DIY projects, construction, or educational purposes. Real-time angle display with degree precision. * Slope - Calculate slope angles and percentages. Essential for construction, landscaping, and accessibility compliance. * Distance - Measure distances using AR technology. Point your camera and get instant distance measurements for room planning. * Height - Measure heights of objects using your iPad's sensors and AR. Perfect for measuring buildings, trees, or furniture. * Speedometer - Track your speed in real-time with GPS. HUD mode for windshield reflection. Max speed and distance tracking. * Plumb Bob - Check vertical alignment with a virtual plumb bob. Essential for construction and hanging fixtures. * Angle Finder - Measure angles using camera-based angle detection. Draw and compare multiple angles. UTILITY TOOLS (20) * Magnifier - Magnify small text or objects with zoom control and flash support. Perfect for reading fine print and inspecting details. * Flashlight - Powerful LED flashlight with adjustable brightness and strobe modes. Never be in the dark again. * Compass - Navigate with confidence using the built-in digital compass. Shows direction, coordinates, altitude, and magnetic field strength. * GPS - Track your location with precision. View latitude, longitude, altitude, speed, and accuracy. Save favorite locations. * Audio - Advanced audio analyzer with frequency spectrum, waveform visualization, and real-time audio monitoring. * Seismograph - Detect and monitor vibrations and movements. Track seismic activity and record shake events. * QR-Code - Scan and generate QR codes. Create custom QR codes for URLs, text, contacts, and more. * Level - Turn your iPad into a professional spirit level with bubble display. Surface and edge modes with calibration. * Mag Flux - Measure magnetic field strength in microteslas. Detect magnetic objects and monitor field variations. * Reader - Text-to-speech reader for PDFs and images. OCR technology extracts text from photos. Adjustable reading speed. * Color Picker - Pick colors from your camera in real-time. Save color palettes with hex, RGB, and HSB values. * Barometer - Monitor atmospheric pressure. Track weather changes with pressure trends and altitude compensation. * Random Generator - Generate random numbers, flip coins, roll dice, and create secure passwords. Perfect for games and decisions. * Lux Meter - Measure light intensity in lux. Professional light measurement for photography and workspace optimization. * Stud Finder - Detect metal studs and magnetic objects in walls using your iPad's magnetometer. Essential for hanging fixtures. * Sun Tracker - Track sun position throughout the day. Plan photography sessions and solar panel installations with sunrise/sunset times. * Decibel Logger - Measure and log sound levels. Monitor noise pollution and track daily noise exposure with detailed history. * Frequency Analyzer - Analyze audio frequencies in real-time. Spectrum analyzer with harmonic detection for musicians and audio professionals. TIME TOOLS (2) * Stop Watch - Precision stopwatch with volume button control for races and workouts. Record multiple laps with highest/lowest indicators. * Timer - Countdown timer with volume button control for hands-free operation. Download Smart Tools Pro today and discover 30 professional tools in one beautifully designed app!

About

Smart Unit Conversion

Features
Read full description

This is a smart unit convertor that: 1. Support 21 languages and the Local Units 2. You can Customize the Sequence of Units 3. European number format supported Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Smart Unit Conversion4 screens

Verdict

The call

The clearest difference is price: Smart Unit Conversion at Free against Smart Tools Pro HD's $0.99. Smart Unit Conversion also leads on device support (3 vs 1) and iOS requirement (13.4 vs 17.0). Smart Tools Pro HD's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence 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

Smart Unit Conversion is free to download; Smart Tools Pro HD costs $0.99 up front. Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year. Smart Tools Pro HD asks for nothing beyond the download.

UpkeepUpdate frequency

Smart Tools Pro HD ships an update every 9 months, Smart Unit Conversion every 15 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard5 real differences · 5 level
Smart Tools Pro HD versus Smart Unit Conversion: the parameters behind the verdict, then further details
ParameterSmart Tools Pro HDSmart Unit Conversion
Price$0.99Free — better
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 9 months — betterEvery 15 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPadiPhone, iPad, iPod — better
Requires iOS17.013.4 — better
Further details — not scored
Size11 MB41 MB
Age rating4+17+
DeveloperShajir KaladyYui Lau

In-app purchases

None

Smart Tools Pro HD

No in-app purchases

1 purchases

Smart Unit Conversion

Subscriptions1
  • 1 Year$1.991 Year

Questions

Is Smart Tools Pro HD free?
Smart Tools Pro HD costs $0.99, with no in-app purchases.
Is Smart Unit Conversion free?
Smart Unit Conversion is free to download, with in-app purchases available.
Do Smart Tools Pro HD or Smart Unit Conversion have ads?
Smart Unit Conversion shows ads; Smart Tools Pro HD does not.
Which is updated more often, Smart Tools Pro HD or Smart Unit Conversion?
Smart Tools Pro HD ships an update every 9 months, and Smart Unit Conversion every 15 months. Most recently, Smart Tools Pro HD was updated on October 29, 2026 and Smart Unit Conversion on October 27, 2026.

Other comparisons