Comparison

Operational Amplifiers Guide vs 3DCraftNexus

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

Head to head
About

Operational Amplifiers Guide

Features
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Operational Amplifiers Guide is your essential tool for designing and analyzing circuits using op-amps and comparators. Whether you're a student, electronics enthusiast, or experienced engineer, this app helps you create, calculate, and understand a wide variety of op-amp–based circuits with ease. Use it as a practical reference when developing projects, building prototypes, or studying amplifier configurations. The app also includes technical data on popular operational amplifier and comparator series β€” making it a handy guide for both design and selection. Available in 14 Languages: β€’ English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese β€” study in your native language! Key Features: β€’ Interactive calculators for common op-amp circuits β€’ Step-by-step explanations and formulas β€’ Reference info on op-amps and comparators β€’ Ideal for learning, prototyping, or quick checks β€’ Light and dark mode support The application contains the following guides and calculators: Amplifiers β€’ Non-inverting operational amplifier β€’ Inverting operational amplifier β€’ Inverting amplifier with T-bridge in OS β€’ Differential amplifier β€’ Differential amplifier with T-bridge in OS β€’ Voltage repeater β€’ Inverting voltage repeater β€’ AC voltage amplifier β€’ High Input Impedance AC Voltage Amplifier β€’ AC voltage repeater ActiveFilters β€’ Non-inverting low-pass filter β€’ Inverting low-pass filter β€’ Non-inverting high-pass filter β€’ Inverting high pass filter β€’ Bandpass filter β€’ Gyrator Integrators and differentiators β€’ Voltage integrator β€’ Sum integrator β€’ Integrator with signal amplification β€’ Difference integrator β€’ Double integrator β€’ Voltage differentiator β€’ Sum Differentiator β€’ Differentiator with T-bridge β€’ Differentiator with T-bridge made of capacitors β€’ Difference differentiator Comparators β€’ Comparator β€’ Limiter β€’ Limiter with zener diode at the input β€’ RS trigger Attenuators β€’ Non-inverting attenuator β€’ Inverting attenuator Converters β€’ Voltage-to-current converter with non-inverting input β€’ Voltage to current converter with inverting input β€’ Voltage to current converter with differential input Adders and substactors β€’ Inverting adder β€’ Addition-subtraction circuit β€’ Non-inverting adder Logarithmic and exponential amplifiers β€’ Diode-based logarithmic amplifier β€’ Transistor-based logarithmic amplifier β€’ Diode exponential amplifier β€’ Exponential transistor amplifier Sine Wave generators: β€’ Op-Amp Oscillators β€’ Oscillator with Diode in the Feedback Path β€’ Twin-T Network Signal Generator Square-wave pulse generators β€’ Op-Amp Square-Wave Generator β€’ Adjustable Square-Wave Generator β€’ Enhanced Square-Wave Generator β€’ Duty-Cycle Adjustment Triangle-wave signal generators β€’ Nonlinear Triangle-Wave Generator β€’ Variable-Symmetry Sawtooth Generator β€’ Linear Triangle-Wave Generator β€’ Adjustable Linear Triangle-Wave Generator β€’ Variable-Symmetry Ramp Generator Popular operational amplifiers: description and pinout Popular comparators: description and pinout Download now and power up your electronics work!

About

3DCraftNexus

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3DCraftNexus is an all-in-one AI creation studio for turning images and ideas into ready-to-use visual assets. CREATE WITH AI β€’ Describe an idea and generate a 2D image β€’ Turn an existing photo into a 2.5D depth image β€’ Convert 2D artwork into a 3D model β€’ Preview and adjust results before you continue IMAGE TO 2.5D Upload a photo and generate a 2.5D depth result. Fine-tune the depth range with the depth filter, control text depth in engraving designs, and preview the effect in 3D. Choose from multiple resolutions to match your project. HAND ENGRAVING STUDIO Build engraving designs on a flexible canvas: β€’ Add photos, public materials, and your own private assets β€’ Add and style text with outline, glow, stamp, neon, gold, and carved presets β€’ Draw freely with a brush β€’ Use smart cutout to remove backgrounds β€’ Crop, rotate, mirror, and arrange layers β€’ Save designs to your album or send them to a compatible device 2D TO 3D Turn 2D images into 3D models with a quick preview, then inspect the model in an interactive 3D viewer. Download or share the result when it is ready. CRYSTAL CUSTOMIZATION & MALL Browse the mall, customize crystal keepsakes with your own images, and place orders. Track every order, from payment to production and delivery, in one place. SEND TO COMPATIBLE DEVICES Connect supported engraving and printing devices by scanning a QR code, then send 2D images, 2.5D depth maps, or 3D models directly from your phone. Manage bound devices and upload records from the device center. ORDERS, WALLET & PARTNER TOOLS Review AI and mall orders, manage your wallet balance, and access partner tools for devices and order records. Availability may vary by region and account type. AI ASSISTANT Ask questions about the app and get guided to the right feature without digging through menus. MULTI-LANGUAGE SUPPORT Available in Simplified Chinese, Traditional Chinese, English, Japanese, French, and Spanish. Notes: β€’ Some features require an internet connection. β€’ Some features require in-app purchases. β€’ Prices are shown in the app before purchase. β€’ Physical products and services are subject to availability.

Screenshots

Operational Amplifiers Guide4 screens
3DCraftNexus4 screens

Verdict

The call

The clearest difference is in-app purchases: Operational Amplifiers Guide at none against 3DCraftNexus's 7. 3DCraftNexus's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. 3DCraftNexus sells 7 one-off in-app purchases. Operational Amplifiers Guide asks for nothing beyond the download.

UpkeepUpdate frequency

Operational Amplifiers Guide ships an update every 2 months, 3DCraftNexus every 3 weeks. The most recent releases landed on October 1, 2026 and October 30, 2026 respectively.

Scorecard3 real differences Β· 3 level
Operational Amplifiers Guide versus 3DCraftNexus: the parameters behind the verdict, then further details
ParameterOperational Amplifiers Guide3DCraftNexus
PriceFreeFree
Update frequencyEvery 2 monthsEvery 3 weeks β€” better
AdsYesNo β€” better
In-app purchasesNo β€” betterYes
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS16.015.0 β€” better
Further details β€” not scored
Size17 MB59 MB
Age rating4+17+
DeveloperALG Software LabYoumina (Beijing) Technology Co., Ltd

In-app purchases

None

Operational Amplifiers Guide

No in-app purchases

7 purchases

3DCraftNexus

One-time7
  • image_to_25D_1K$0.99
  • image to 3D$1.99
  • image to 2.5D$2.99
Show 4 more
  • images_to_2.5D_2K$2.99
  • benefit_card_25D_svip$9.99
  • image_to_25D_4K$9.99
  • SVIP 2.5Dη”Ÿε›ΎζœˆεΊ¦ζƒη›Šε‘$44.99

Questions

Is Operational Amplifiers Guide free?
Operational Amplifiers Guide is free to download, with no in-app purchases.
Is 3DCraftNexus free?
3DCraftNexus is free to download, with in-app purchases available.
Do Operational Amplifiers Guide or 3DCraftNexus have ads?
Operational Amplifiers Guide shows ads; 3DCraftNexus does not.
Which is updated more often, Operational Amplifiers Guide or 3DCraftNexus?
Operational Amplifiers Guide ships an update every 2 months, and 3DCraftNexus every 3 weeks. Most recently, Operational Amplifiers Guide was updated on October 1, 2026 and 3DCraftNexus on October 30, 2026.

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