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Best Pqdif Viewer Apps

224+ iOS apps curated and reviewed

4.0 avg rating
19 free apps
Updated June 2026

Looking for free pqdif viewer apps? 19 of our 224+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Pqdif Viewer

Enphase Enlighten#2

Enphase Enlighten by Enphase Energy, Inc.

Strong Contender
🔧 Utilities
4.6😐(89K ratings)
Free
Enphase Enlighten screenshot 1
Enphase Enlighten screenshot 2
Enphase Enlighten screenshot 3
Enphase Enlighten screenshot 4
Enphase Enlighten screenshot 5

Monitor your solar energy system's performance with ease. Verify system health, view energy production by time period, and analyze performance against weather data. Generate reports on energy production and usage directly from the app.

What We Love

  • 🚀 Excellent monitoring of solar production and consumption
  • 📊 Detailed data and reporting
  • 🔍 Ability to view individual panel performance
  • 🌳 Estimates environmental impact (e.g. trees saved)

Room to Improve

  • 🐛 App stability issues, crashes, and data not updating
  • 🕰️ Infrequent data updates (e.g. 15 minutes)
  • 🤔 Confusing UI and navigation
Decibel Meter Ultra#3

Decibel Meter Ultra by Ultrafine, Lda

Noise Level Frequency Analyzer
Worth Considering
🔧 Utilities
4.6😞(2.3K ratings)
FreeAdsIn-App Purchases
Decibel Meter Ultra screenshot 1
Decibel Meter Ultra screenshot 2
Decibel Meter Ultra screenshot 3
Decibel Meter Ultra screenshot 4
Decibel Meter Ultra screenshot 5
Decibel Meter Ultra screenshot 6

Measure, record, and analyze sound levels in your environment. This app offers precision metering, noise elimination tools, hearing protection features, and home audio calibration. It provides detailed reports and can be used with device microphones or external ones.

What We Love

  • 🎨 Aesthetically pleasing design
  • 🔍 Useful noise monitoring features
  • 🔍 Ability to collect noise evidence

Room to Improve

  • 💰 Expensive subscription pricing
  • 🚫 Misleading free trial claims
  • 🚫 Difficult to cancel subscription

More Pqdif Viewer apps to explore

4
Generac PWRview
Generac PWRview
Generac PWRview
Monitor your Generac system!
Free

Monitor your home's energy production and consumption in real-time. Track solar generation, battery capacity, and daily energy usage to understand your system's performance and potential savings.

Live energy monitoringReal-time power consumption trackingSolar production and battery capacity monitoring
🔧 Utilities
(1.8K)
free
5
Anker
Anker
Anker
by Power Mobile Life LLC
Free

Remotely manage and monitor your Anker power banks, outdoor energy storage, and solar devices. Control output, check status, and perform over-the-air updates for a smarter energy experience.

Remote device controlReal-time status monitoringOver-the-air updates
🔧 Utilities
(1.2K)
free
6
3D Model Viewer - AR View
3D Model Viewer - AR View
3D Model Viewer - AR View
View model in AR and 3D mode
Free

View and interact with various 3D model formats in both AR and 3D modes. This intuitive tool supports local and cloud documents, custom backgrounds, and shadow casting. Easily import models via multiple methods and share your creations.

AR and 3D viewing modesSupports numerous 3D file formatsLocal and cloud document integration
📊 Productivity
(323)
free with in-app purchases
7
Ugly's Electrical References
Ugly's Electrical References
Ugly's Electrical References
by Informed Publishing
$12.99

This app provides electricians and electrical professionals with up-to-date digital information based on the National Electrical Code. It includes formulas, wiring diagrams, conduit bending guides, and calculators for various electrical calculations. The app is designed for on-the-job reference and works offline.

NEC 2026 updatesMathematical formulas and calculatorsConduit bending guide with videos
📊 Productivity
(1.5K)
paid
8
Frequency Analyzer
Frequency Analyzer
Frequency Analyzer
Audio Spectrum, Spectroid, dB
Free

Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.

Real-time FFT analysisCalibrated SPL measurements32-bit float audio recording
🔧 Utilities
(97)
free with in-app purchases
9
Fast Image Viewer Free
Fast Image Viewer Free
Fast Image Viewer Free
by TDF Software
Free

This app quickly displays large image files, including scanned documents and engineering drawings, directly from cloud storage or your camera roll. It excels at viewing bitonal images with optimized decoding for fast navigation. The free version includes ads, while a paid version offers printing and PDF conversion.

Optimized viewing of large bitonal imagesDirect access to cloud storage and camera rollNo image import or temporary data creation
🔧 Utilities
(2)
ad-supported
10
PCAP File Viewer · Analyzer
PCAP File Viewer · Analyzer
PCAP File Viewer · Analyzer
Open & Analyze PcapNG Files
Free
🔧 Utilities
(0)
11
EnerTalk - Energy Monitor
EnerTalk - Energy Monitor
EnerTalk - Energy Monitor
by Encored Technologies, Inc.
Free

Monitor your home's real-time electricity usage and spending directly from your smartphone. Visualize daily and monthly patterns, estimate your bills, and receive personalized saving tips. Supports multiple properties without requiring new hardware.

Real-time energy usage monitoringDaily and monthly usage patternsMonthly bill estimation
🔧 Utilities
(220)
free with in-app purchases
12
FuelTech Datalog Viewer
FuelTech Datalog Viewer
FuelTech Datalog Viewer
by FuelTech
Free

Analyze engine data logs from compatible FuelTech ECUs on your mobile device. View up to four channels simultaneously for quick data analysis and check status events for errors. Log files must be transferred to the device manually.

View up to 4 recorded channels simultaneouslyQuick data analysisCheck status events for errors
🔧 Utilities
(4)
free
13
Comtrade Viewer
Comtrade Viewer
Comtrade Viewer
COMTRADE analog trace viewer.
Free
🔧 Utilities
(0)
14
Ohms Law Calc.
Ohms Law Calc.
Ohms Law Calc.
Wire Size & Voltage Drop
Free

This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.

Ohm's Law calculationsVoltage drop calculatorWire size calculator
🔧 Utilities
(1.3K)
free with in-app purchases
15
Electronics Engineer Helper
Electronics Engineer Helper
Electronics Engineer Helper
Calculators and references
Free

This app provides a comprehensive suite of calculators and reference tools for electronics enthusiasts and professionals. It includes features for component identification, circuit calculations, and electrical property analysis, aiding in both study and practical work.

Datasheet searchResistor color code calculatorElectronic schematic symbols
📊 Productivity
(427)
free with in-app purchases
16
Netzero for Powerwall
Netzero for Powerwall
Netzero for Powerwall
Home energy management
Free

Automate your home energy system to maximize savings and monitor your Powerwall's health. Integrate with utility providers for dynamic pricing and receive alerts for solar or battery issues. Gain insights into energy production and use your device as a home energy dashboard.

Powerwall automation and schedulingUtility tariff integrationSolar production monitoring
🔧 Utilities
(653)
freemium
17
Spectrum Analyzer: Spectrogram
Spectrum Analyzer: Spectrogram
Spectrum Analyzer: Spectrogram
Audio frequency visualizer
Free

Visualize audio frequencies with real-time analysis. Features include a sound level meter, multichannel harmonic analysis, and adjustable graphical representations. Gain insights into your sound environment with advanced tools.

Sound level meterMultichannel harmonic analysisAdjustable graphics
🎵 Music
(192)
freemium
18
PowerProbe Link
PowerProbe Link
PowerProbe Link
by MGL APPA CORPORATION
Free

This utility app connects to specific PowerProbe devices, enabling wireless data logging and remote monitoring. Users can download log data and export it to CSV files for analysis and reporting.

Wireless data loggingRemote measurement monitoringLog data download
🔧 Utilities
(4)
free
19
RTA Audio
RTA Audio
RTA Audio
by New Ball s.r.o.
Free

Analyze audio in real-time with detailed frequency spectrum and waveform visualizations. Record and export your audio analysis results, including spectrograms and frequency tables, for sharing or archiving.

Real-time audio analysis (FFT)Recording and offline processingSpectrogram and waveform visualization
🎵 Music
(31)
free with in-app purchases
20
Enlighten Manager
Enlighten Manager
Enlighten Manager
by Enphase Energy, Inc.
Free

Monitor and manage Enphase PV systems with powerful mobile tools. Analyze performance, compare production across multiple sites, and diagnose variations. Track installations in progress from any online device.

Performance monitoringSystem managementDetailed analysis and reports
🔧 Utilities
(79)
free