Comparison

Electronic Circuits Calc Pro vs Premipro

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

Head to head
About

Electronic Circuits Calc Pro

Features
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Electronic Circuits Calc Pro is your ultimate electronics toolkit — featuring over 130 calculators, circuit tools, and guides for beginners and professionals alike. Perfect for electronics enthusiasts, students, hobbyists, and engineers alike, Electronic Circuits Calculator Pro is a powerful reference tool covering essential electronics concepts, components, and circuit design. Whether you're just getting started or need a quick calculation on the go, this app has you covered. Key Features: • Interactive calculators for circuits • Step-by-step explanations and formulas • Ideal for learning, prototyping, or quick checks • Full-text search for instant access to any topic • Designed for both light & dark modes Available in 14 Languages: • English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese — study in your native language! Categories Included: Basic calculators • Ohm's Law • Power, voltage and current • Resistive voltage divider • Wheatstone Bridge • RC circuit time constant • Battery Life • Additional resistor for voltmeter • Shunt resistor for ammeter Resistors • Resistor color codes • SMD resistor codes • EIA-96 Encoding • Standard values finder for resistor • Series resistors • Parallel resistors • E series Capacitors • Ceramic disc capacitors codes • Film capacitors codes • Capacitor working voltage codes • Film capacitors colour codes • SMD Tantalum electrolytic capacitors codes • Series capacitors • Parallel capacitors Inductors • Inductor color codes • SMD inductors codes • Series inductors Diodes • Diodes • Rectifier diodes • Signal diodes • Schottky diode • Tunnel diode • Varicap • Zener diode Transistors • Bipolar transistors • Metal-Oxide-Semiconductor Field-Effect Transistor • Junction Field-Effect Transistor • Unijunction transistor • Insulated gate bipolar transistor • Darlington transistor pair Thyristors • Thyristors • Gate Turn-Off Thyristor • TRIAC • DIAC • IGCT thyristor • MOS-Controlled Thyristor • Programmable unijunction transistor PowerSupplies • AC parameters and rectified value • Half-wave rectifier • Full-wave rectifier • Bridge rectifier • Capacitive power supply • Power source internal resistance • Symmetrical voltage doubling rectifier circuit • Three-Phase Half-Wave Rectifier • Three-phase bridge rectifier • Voltage multiplier Voltage and current regulators • LM317 Voltage regulator calculator • Bipolar voltage regulator for LM317 and LM337 • LM317 Current Source calculator • Zener reference voltage source • Thermally compensated voltage reference • Calculation of the stabilizer on TL431 • The TL431 stabilizer with additional transistor LED • Introduction of LEDs • LED Single Resistor calculator • LED Series Resistor calculator • LED Parallel Resistor calculator • 7-segment LED display • Decoder (driver) for 7-segment displays CD4511 Photocells • Photodiode • Photoresistor • Phototransistor • Optocoupler OP • Non-Inverting OP Amplifer Gain calculator • Inverting OP Amplifier Gain calculator • Inverting amplifier with T-bridge in feedback • Inverting summing OP Amplifier • Differential OP amplifier • OP Voltage integrator • OP Voltage Differentiator • OP Voltage comparator Frequency • Capacitor reactance • Reactance of an inductance coil • Gain conversion to decibels • dBm to Watts conversion • T-Attenuator • Pi-Attenuator • L-Attenuator • Bridged T-Attenuator • Capacitive AC Voltage Divider • Inductive Voltage Divider • Frequency and wavelengths Filters • RC Pass Filter • RC Band pass filter • RL filter • LC Pass Filter Timers • Astable multivibrator • Monostable (waiting) multivibrator • Bistable multivibrator • Multivibrator with additional diodes • NE555 Astable Multivibrator • NE555 Monostable Multivibrator Logic gates: - AND. OR, NOT, NAND, NOR, XOR, XNOR The application is being actively developed and supplemented with new calculators. Keep for updates!

About

Premipro

Features
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Premipro AI - SMART VIDEO EDITOR POWERED BY ARTIFICIAL INTELLIGENCE PrimCut AI brings the power of professional video editing to your phone. From quick cuts to AI-powered background removal, auto captions, and Hollywood-style transitions, everything you need is right in your hands. ---------------------------------------- AI BACKGROUND REMOVAL Remove video or photo backgrounds instantly using on-device AI powered by MediaPipe. No green screen required. Your subject is cleanly isolated in real time, frame by frame, so you can place it over any scene or color. CHROMA KEY GREEN SCREEN Take full control with manual chroma key. Pick any background color to remove, adjust similarity and smoothness, and composite your footage over any background with pro-level precision. AUTO CAPTIONS AND TEXT TO SPEECH Generate captions automatically using AI speech recognition. Add animated text overlays with cinematic presets. Use the built-in AI Text to Speech engine to convert any text into natural-sounding voiceover in seconds. TEXT TRACKING Lock text labels to moving subjects in your video. The AI tracking engine follows motion automatically so your captions and titles stay perfectly placed throughout the clip. ---------------------------------------- MULTI-TRACK TIMELINE EDITOR Work with a professional timeline supporting multiple video and audio tracks. Layer footage, music, voiceover, and text independently. Every track can be toggled, locked, or reordered with a simple tap. CUT TRIM SPLIT Slice clips precisely at the playhead. Trim from the left or right of any cut point. Split one clip into multiple segments for granular control over your edit. TRANSITIONS Choose from a full library of transitions including fades, slides, wipes, and shape cuts. Drop them between any two clips on the timeline with a single tap and preview them instantly. FILTERS AND COLOR GRADING Apply cinematic color filters to your clips. Fine-tune brightness, contrast, saturation, shadows, highlights, and sharpness with the built-in Adjustment panel. Save custom presets to reuse across projects. CROP AND ASPECT RATIO Crop any clip to a custom rectangle. Choose from popular aspect ratios including 16 by 9, 9 by 16, 4 by 3, 1 by 1, and cinematic 2.35 to 1. Your ratio choice carries through to the final export automatically. SPEED CONTROL Speed up or slow down any clip for dramatic effect. Apply smooth keyframe-based speed ramps to create cinematic fast-to-slow transitions within a single clip. KEYFRAME ANIMATION Animate position, scale, rotation, opacity, and more using keyframes. Set two or more keyframe points and PrimCut AI interpolates the motion smoothly between them. AUDIO TOOLS Import background music or record a voiceover directly in the app. Adjust volume, apply fade in and fade out, and mix multiple audio tracks independently. TEXT AND TITLES Use the text library to add titles, labels, and animated typography. Pick from a growing collection of text presets or build your own style and save it for later use. EXPORT IN HIGH DEFINITION Export your finished video in up to 1080p HD. Choose between Low, Medium, and High quality presets to balance file size and clarity. Your exported videos are saved to your device and accessible from My Exports at any time. ---------------------------------------- WHO IS PRIMCUT AI FOR Content creators who want to stand out on social media. Students and professionals who want to produce polished video quickly. Anyone who wants the power of a desktop editor in the palm of their hand. Download Premipro AI today and edit like a pro. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/cutpad-privacy-policy/home

Screenshots

Electronic Circuits Calc Pro4 screens
Premipro3 screens

Verdict

The call

The clearest difference is price: Premipro at Free against Electronic Circuits Calc Pro's $4.99. Premipro also leads on update cadence (every 9 days vs every 2 months) and iOS requirement (15.0 vs 17.0). Electronic Circuits Calc Pro's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support 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

Premipro is free to download; Electronic Circuits Calc Pro costs $4.99 up front. Premipro sells 2 in-app purchases, starting at $0.99 per month. Electronic Circuits Calc Pro asks for nothing beyond the download.

UpkeepUpdate frequency

Electronic Circuits Calc Pro ships an update every 2 months, Premipro every 9 days. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

Scorecard5 real differences · 1 level
Electronic Circuits Calc Pro versus Premipro: the parameters behind the verdict, then further details
ParameterElectronic Circuits Calc ProPremipro
Price$4.99Free — better
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size19 MB42 MB
Age rating4+4+
DeveloperALG Software LabDiep Huu Kha

In-app purchases

None

Electronic Circuits Calc Pro

No in-app purchases

2 purchases

Premipro

Subscriptions1
  • Monthly$0.991 Month
One-time1
  • Lifetime$9.99

Questions

Is Electronic Circuits Calc Pro free?
Electronic Circuits Calc Pro costs $4.99, with no in-app purchases.
Is Premipro free?
Premipro is free to download, with in-app purchases available.
Do Electronic Circuits Calc Pro or Premipro have ads?
Premipro shows ads; Electronic Circuits Calc Pro does not.
Which is updated more often, Electronic Circuits Calc Pro or Premipro?
Electronic Circuits Calc Pro ships an update every 2 months, and Premipro every 9 days. Most recently, Electronic Circuits Calc Pro was updated on November 3, 2026 and Premipro on October 28, 2026.

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