Comparison

DA40 M&B mobile vs Operational Amplifiers Pro

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

Head to head
About

DA40 M&B mobile

Features
Currently charting
Read full description

Diamond DA40 Mass & Balance calculator! With easy and interactive weights adding and real time Chart plotting. You can calculate for the following Diamond models: DA40-180, DA40-XL / S, DA-40-F, DA40-P and DA40-NG Get access to Loading Charts for accurate reading. Red Dot "marks the Spot". Also Red warning alerts if you're overweight! Create your PDF file with your loadsheet in a professional looking sheet, save it, print it, share it or e-mail it! Includes regulatory data such as A/C registration, departure aerodrome, arrival aerodrome, time and date. Convert all necessary weight and fuel Units on a dedicated page. Mass and Balance was never so easy. Enjoy your Mass and Balance on your iPhone! Also Apps Available for a single Aircraft for Diamond DA20, Cessna C152, C172 and C182, Piper PA28, PA34 and PA44 or get All models in just one App

About

Operational Amplifiers Pro

This app provides interactive calculators and reference information for designing and analyzing op-amp circuits. It offers step-by-step explanations and technical data on popular op-amp series, aiding students and engineers in circuit development and prototyping.

Highlights
  • Interactive op-amp circuit calculators
  • Step-by-step explanations and formulas
  • Reference data on op-amps and comparators
  • Support for 14 languages
  • Light and dark mode
  • Advanced calculators and circuit guides (Pro)
  • Full-text search (Pro)
Features
Read full description

Operational Amplifiers Pro is your essential tool for designing and analyzing circuits using op-amps. 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 — making it a handy guide for both design and selection. 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! Key Features: • Interactive calculators for common op-amp circuits • Step-by-step explanations and formulas • Reference info on op-amps and comparators • Ideal for learning, prototyping, or quick checks • Light and dark mode support Pro Version Includes: • Advanced calculators and circuit guides • Full-text topic search • Save favorite circuits for quick access The application contains the following guides and calculators: Amplifiers • Non-inverting operational amplifier • Inverting operational amplifier • Inverting amplifier with T-bridge in OS • Differential amplifier • Differential amplifier with T-bridge in OS • Voltage repeater • Inverting voltage repeater • AC voltage amplifier • High Input Impedance AC Voltage Amplifier • AC voltage repeater ActiveFilters • Non-inverting low-pass filter • Inverting low-pass filter • Non-inverting high-pass filter • Inverting high pass filter • Bandpass filter • Gyrator Integrators and differentiators • Voltage integrator • Sum integrator • Integrator with signal amplification • Difference integrator • Double integrator • Voltage differentiator • Sum Differentiator • Differentiator with T-bridge • Differentiator with T-bridge made of capacitors • Difference differentiator Comparators • Comparator • Limiter • Limiter with zener diode at the input • RS trigger Attenuators • Non-inverting attenuator • Inverting attenuator Converters • Voltage-to-current converter with non-inverting input • Voltage to current converter with inverting input • Voltage to current converter with differential input Adders and substactors • Inverting adder • Addition-subtraction circuit • Non-inverting adder Logarithmic and exponential amplifiers • Diode-based logarithmic amplifier • Transistor-based logarithmic amplifier • Diode exponential amplifier • Exponential transistor amplifier • Popular operational amplifiers description and pinout Sine Wave generators • Op-Amp Oscillators • Oscillator with Diode in the Feedback Path • Twin-T Network Signal Generator Square-wave pulse generators • Op-Amp Square-Wave Generator • Adjustable Square-Wave Generator • Enhanced Square-Wave Generator • Duty-Cycle Adjustment • Triangle and Square-Wave Generator • Generator with Adjustable Slope and Duty Cycle Triangle-wave signal generators • Nonlinear Triangle-Wave Generator • Variable-Symmetry Sawtooth Generator • Linear Triangle-Wave Generator • Adjustable Linear Triangle-Wave Generator • Variable-Symmetry Ramp Generator Download now and power up your electronics work!

Screenshots

DA40 M&B mobile4 screens
Operational Amplifiers Pro4 screens

Verdict

The call

The clearest difference is price: DA40 M&B mobile at $1.99 against Operational Amplifiers Pro's $4.99. DA40 M&B mobile also leads on chart position (#194 vs unranked). Operational Amplifiers Pro's advantage is device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement 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

DA40 M&B mobile costs $1.99 and Operational Amplifiers Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DA40 M&B mobile ships an update every 3 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on October 30, 2026 and October 19, 2026 respectively.

Scorecard3 real differences · 7 level
DA40 M&B mobile versus Operational Amplifiers Pro: the parameters behind the verdict, then further details
ParameterDA40 M&B mobileOperational Amplifiers Pro
Price$1.99 — better$4.99
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank#194 — better—
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS16.6 — better17.0
Further details — not scored
Size8 MB14 MB
Age rating4+4+
DeveloperPedro IsidoroALG Software Lab

In-app purchases

None

DA40 M&B mobile

No in-app purchases

None

Operational Amplifiers Pro

No in-app purchases

Questions

Is DA40 M&B mobile free?
DA40 M&B mobile costs $1.99, with no in-app purchases.
Is Operational Amplifiers Pro free?
Operational Amplifiers Pro costs $4.99, with no in-app purchases.
Do DA40 M&B mobile or Operational Amplifiers Pro have ads?
Neither DA40 M&B mobile nor Operational Amplifiers Pro shows ads.
Which is updated more often, DA40 M&B mobile or Operational Amplifiers Pro?
DA40 M&B mobile ships an update every 3 months, and Operational Amplifiers Pro every 2 months. Most recently, DA40 M&B mobile was updated on October 30, 2026 and Operational Amplifiers Pro on October 19, 2026.

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