Comparison

Signals and Systems vs Voltios

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

Head to head
About

Signals and Systems

Features
Read full description

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://forwaelade.web.app/SignalsSystems/privacy-policy Boost your understanding of Signals and Systems with our interactive engineering quiz app! Designed for students, engineers, and enthusiasts, this app covers key concepts and applications in Signals and Systems to help you ace exams, prepare for interviews, and enhance your technical skills. Features: Comprehensive Topics: Dive into Fourier analysis, Laplace transforms, Z-transforms, convolution, modulation, and more. Perfectly tailored for beginners and advanced learners alike. Interactive Quizzes: Test your knowledge with multiple-choice questions, numerical problems, and real-world application scenarios. Detailed Explanations: Learn as you go with in-depth explanations for every question. Progress Tracking: Monitor your performance, identify weak areas, and work on them effectively. Modern Tools: Includes coverage of time-frequency analysis, digital filter design, and emerging trends in signal processing. Whether you're studying for exams, preparing for competitive tests, or brushing up on core concepts, this app is your ultimate learning partner for mastering Signals and Systems. Download now and take your engineering skills to new heights!

About

Voltios

A puzzle game that teaches the fundamentals of electricity through interactive circuit building. Explore various electrical concepts like switches, short circuits, and Ohm's law in a visually engaging and playful manner. Designed for families with no ads or tracking, offering a complete learning experience with a single purchase.

Highlights
  • Interactive circuit building
  • Learn electrical concepts visually
  • Explore switches, fuses, and Ohm's law
  • 68 levels across 9 worlds
  • Offline play
  • No ads or tracking
Features
Currently charting
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Build circuits, light up the world. Voltios is a puzzle game for learning electricity visually. Connect wires, close switches and watch what changes: a bulb lights up, a motor spins or a fuse protects the circuit. LEARN BY DOING • Discover why current needs a closed circuit. • Experiment with switches, conductors and insulators. • Avoid short circuits and learn how to use fuses. • Compare series and parallel circuits. • Explore Ohm's law and measure voltage and current with the multimeter. 10 WORLDS, 78 LEVELS Keep the original 68 campaign levels and discover 10 new levels in Laboratory, available after completing World 5. All content is included in the app purchase and opens through gameplay progression. First Sparks · Switch It! · Danger: Short Circuit · Measure & Choose · Ohm's Law · Circuit Master · Clocks & Crossings · Real Life · Magnets & Motors · Laboratory. EXPERIMENT AT YOUR OWN PACE • Component explanations, hints and learning recaps. • A daily challenge to keep practising. • A refreshed interface and a multimeter integrated into the board. • English and Spanish. For iPhone and iPad with iOS/iPadOS 17 or later. ONE APP PURCHASE No subscriptions, in-app purchases or ads. No Voltios account required. Gameplay works offline; iCloud, Game Center and sending analytics require a connection. Progress is saved on your device and synced through iCloud when available. Game Center is optional and retains the original campaign achievements. We use TelemetryDeck for interaction analytics with anonymized identifiers, without advertising tracking. See our privacy policy for details.

Screenshots

Signals and Systems4 screens
Voltios4 screens

Verdict

The call

The clearest difference is price: Signals and Systems at Free against Voltios's $0.99. Voltios's advantage is update cadence (every 2 weeks vs every 5 weeks) and chart position (#119 vs unranked). On ads, in-app purchases, device support 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

Signals and Systems is free to download; Voltios costs $0.99 up front. Signals and Systems sells 6 in-app purchases, starting at $9.99 per month and Voltios sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Signals and Systems ships an update every 5 weeks, Voltios every 2 weeks. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Signals and Systems versus Voltios: the parameters behind the verdict, then further details
ParameterSignals and SystemsVoltios
PriceFree — better$0.99
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
Monetization—Paid
Best chart rank—#119 — better
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size18 MB6 MB
Age rating4+4+
DeveloperForwa Elade WundeIgnacio Noguerol Sicilia

In-app purchases

6 purchases

Signals and Systems

Subscriptions3
  • 1 Month$9.991 Month
  • 6 Months$19.996 Months
  • 1 Year$29.991 Year
One-time3
  • 1500$0.99
  • 3500$1.99
  • 9000$3.99
1 purchases

Voltios

One-time1
  • Full Game$4.99

Questions

Is Signals and Systems free?
Signals and Systems is free to download, with in-app purchases available.
Is Voltios free?
Voltios costs $0.99, and also offers in-app purchases.
Do Signals and Systems or Voltios have ads?
Neither Signals and Systems nor Voltios shows ads.
Which is updated more often, Signals and Systems or Voltios?
Signals and Systems ships an update every 5 weeks, and Voltios every 2 weeks. Most recently, Signals and Systems was updated on October 7, 2026 and Voltios on October 25, 2026.

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