Comparison

Arlektra vs 555 Timer & Oscillators Guide

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

Head to head
About

Arlektra

This app uses augmented reality to teach electronics and circuits. Visualize complex theories, build circuits with step-by-step 3D instructions, and explore electrical parts in detail. Learn to use tools like a digital multimeter with interactive guidance.

Highlights
  • Augmented reality 3D instructions
  • Visualize electrical theories
  • Step-by-step circuit building
  • Explore electrical parts in 3D
  • Learn multimeter usage
  • Interactive troubleshooting guidance
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Arlektra teaches electronics and circuits hands-on, with real-time Augmented Reality 3D instructions and animations through your phone or tablet. Now you easily learn, build and see the world of electronics and circuits like never before! When using Arlektra's complete learning kit, or the demo Arlektra Image Target, learners will: [SEE THEORY] Arlektra will allow you to easily visualize and comprehend the most difficult electrical concepts and theories, as they come alive right before your very eyes. You'll finally understand the unseen complexities of electrical theory, with vision and insight beyond your imagination. [BUILD CIRCUITS] Using step-by-step Visual (3D), Audio and Text instructions, Arlektra will teach you to build electrical circuits, with ease. You’ll learn to build various types of circuits, while using different electrical parts to do so - all without any assistance. [EXPLORE PARTS] Arlektra will allow you to see real electrical parts in detailed 3D exploded and 360 views - while you look through your mobile device. You'll learn about their inner workings and operation, and how they connect and work together in electrical circuits. [LEARN TOOLS] Arlektra will teach you how to you use a digital multimeter in ways that have never been done before, with 3D assistance. You'll learn a multimeters functions and how to test circuits and conduct basic electrical troubleshooting procedures. Arlektra comes with everything you want and need. No other app in the universe can teach you electronics and circuits like Arlektra. It will inspire and prepare you for the future, beyond your imagination! [Requirements] 
*Camera Permissions: Needed by the Arlektra app to produce the Augmented Reality experience through your rear camera

 *Guest Menu Lessons: To use these lessons, you must first download and print the required Arlektra Image Target from: arstemlabs.com/arlektra-demo

About

555 Timer & Oscillators Guide

Features
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Master the design of oscillators and waveform generators using 555 timer integrated circuits, digital logic integrated circuits, operational amplifiers, and transistors. The application provides a comprehensive collection of over 130 tutorials and circuit diagrams, covering 555 timer circuits and practical applications, CMOS 4000 series logic oscillators, TTL 74LS and 74HC series oscillators, operational amplifier–based waveform generators, and transistor multivibrators. Designed for electronics beginners, students, hobbyists, and professional engineers, the app serves as a complete reference and learning tool for designing, understanding, and building oscillators, multivibrators, pulse generators, and waveform circuits commonly used in both analog and digital electronics. In addition to tutorials and schematics, the app includes built-in calculators for frequency, timing, duty cycle, and component value estimation, helping users quickly calculate and adjust circuit parameters. All topics are presented with clear circuit diagrams and detailed explanations. 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! Covered Topics: • 555 Timer IC Series • Astable, monostable, and bistable modes • Pulse Width Modulation (PWM) • Voltage conversion circuits • Sensor and external module interfacing • CMOS Logic Oscillators • CMOS 4000 series circuits • Astable, monostable, and bistable modes • Gated CMOS oscillators • TTL / HC Logic Oscillators • TTL 74LS series circuits • 74HC series logic oscillators • Astable and monostable modes • Operational Amplifier Oscillators • Sine wave generators • Square-wave pulse generators • Triangle wave generators • Transistor-Based Oscillators • Transistor-Based Astable multivibrators • Transistor-Based Monostable multivibrators The content is regularly updated and expanded with each new release, ensuring the latest tutorials and circuit examples are always available.

Screenshots

Arlektra4 screens
555 Timer & Oscillators Guide4 screens

Verdict

The call

The clearest difference is ads: Arlektra at none against 555 Timer & Oscillators Guide's shown. On price, update cadence, in-app purchases and 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Arlektra ships an update every 6 months, 555 Timer & Oscillators Guide every 5 months. The most recent releases landed on July 9, 2026 and September 24, 2026 respectively.

Scorecard1 real difference · 9 level
Arlektra versus 555 Timer & Oscillators Guide: the parameters behind the verdict, then further details
ParameterArlektra555 Timer & Oscillators Guide
PriceFreeFree
Rating2.4 (7 ratings) — better—
Positive reviews20.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 6 monthsEvery 5 months — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size433 MB24 MB
Age rating4++4
DeveloperAR STEM LABSALG Software Lab

In-app purchases

None

Arlektra

No in-app purchases

None

555 Timer & Oscillators Guide

No in-app purchases

Questions

Is Arlektra free?
Arlektra is free to download, with no in-app purchases.
Is 555 Timer & Oscillators Guide free?
555 Timer & Oscillators Guide is free to download, with no in-app purchases.
Do Arlektra or 555 Timer & Oscillators Guide have ads?
555 Timer & Oscillators Guide shows ads; Arlektra does not.
Which is updated more often, Arlektra or 555 Timer & Oscillators Guide?
Arlektra ships an update every 6 months, and 555 Timer & Oscillators Guide every 5 months. Most recently, Arlektra was updated on July 9, 2026 and 555 Timer & Oscillators Guide on September 24, 2026.

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