Comparison

Timer 555 Calculator Pro vs PCB Studio Maker

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

Head to head
About

Timer 555 Calculator Pro

Calculate parameters for monostable and astable circuits. Find component combinations for desired pulse width or frequency. Share circuit files via iCloud Drive or AirDrop.

Highlights
  • Calculate monostable pulse width
  • Calculate astable frequency
  • Find component combinations
  • Adjust component tolerance
  • Unlimited combinations (Pro)
  • Share circuit files
Read full description

This app is used to calculate monostable and astable circuit. Features * Calculate pulse width of monostable circuit * Calculate frequency of astable circuit * Find out combination of components making a desire pulse width in monostable circuit * Find out combination of components making a desire frequency in astable circuit * Share file to iCloud Drive (For iOS8 or later) * Share file via AirDrop Additional Features in the Professional Edition * Unlimited number of combinations * Allow to change tolerance * No ads

About

PCB Studio Maker

Features
Read full description

PCB Studio Maker is a modern PCB design workspace built for Mac, iPhone and iPad. Create electronic projects from schematic to finished board using a clean, focused interface designed for fast prototyping, learning and real-world hardware development. Start with your schematic, organize components and nets, sync your design with the PCB layout, route tracks, inspect connections and preview your board in 3D before preparing it for manufacturing. KEY FEATURES • Schematic Design Create and organize electronic circuits with components, pins, nets and footprints. • PCB Layout Editor Place components, route copper tracks, add vias, inspect layers and refine your board layout. • Component Library Browse common resistors, capacitors, LEDs, connectors, ICs, MOSFETs, drivers, regulators and other electronic components. • 3D Board Preview Visualize your PCB and component placement in an interactive 3D view. • Design Rule Checks Review warnings, connectivity issues and potential design problems before manufacturing. • Manufacturing Preparation Review board layers, footprints, routing and fabrication requirements before export. • Export Tools Prepare manufacturing packages, board previews, parts lists, project files and other useful design outputs. • Multi-Device Workflow Use PCB Studio Maker on Mac, iPhone and iPad and continue designing wherever you work. PCB Studio Maker is useful for: • Electronics students • Makers and hobbyists • Embedded developers • Robotics projects • IoT development • Prototype electronics • PCB experimentation • Hardware engineers Whether you are building a simple prototype, motor controller, sensor board, embedded system or custom electronics project, PCB Studio Maker gives you the tools to move from idea to physical board in one streamlined workspace. Design. Route. Preview. Manufacture. Build your next PCB with PCB Studio Maker. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ The app uses Apple's Standard Licensed Application End User License Agreement.

Screenshots

Timer 555 Calculator Pro4 screens
PCB Studio Maker4 screens

Verdict

The call

The clearest difference is price: PCB Studio Maker at Free against Timer 555 Calculator Pro's $0.99. PCB Studio Maker also leads on update cadence (every 3 days vs every 3 months). Timer 555 Calculator Pro's advantage is in-app purchases (none vs 1) and iOS requirement (13.2 vs 17.6). On ads 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

PCB Studio Maker is free to download; Timer 555 Calculator Pro costs $0.99 up front. PCB Studio Maker sells 1 in-app purchase, starting at $4.99 per month. Timer 555 Calculator Pro asks for nothing beyond the download.

UpkeepUpdate frequency

Timer 555 Calculator Pro ships an update every 3 months, PCB Studio Maker every 3 days. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 6 level
Timer 555 Calculator Pro versus PCB Studio Maker: the parameters behind the verdict, then further details
ParameterTimer 555 Calculator ProPCB Studio Maker
Price$0.99Free — better
Rating4.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.2 — better17.6
Further details — not scored
Size3 MB11 MB
Age rating4+4+
DeveloperSiu Yuen HoMirza Pasic

In-app purchases

None

Timer 555 Calculator Pro

No in-app purchases

1 purchases

PCB Studio Maker

Subscriptions1
  • PCB Studio Pro$4.991 Month

Questions

Is Timer 555 Calculator Pro free?
Timer 555 Calculator Pro costs $0.99, with no in-app purchases.
Is PCB Studio Maker free?
PCB Studio Maker is free to download, with in-app purchases available.
Do Timer 555 Calculator Pro or PCB Studio Maker have ads?
Neither Timer 555 Calculator Pro nor PCB Studio Maker shows ads.
Which is updated more often, Timer 555 Calculator Pro or PCB Studio Maker?
Timer 555 Calculator Pro ships an update every 3 months, and PCB Studio Maker every 3 days. Most recently, Timer 555 Calculator Pro was updated on October 10, 2026 and PCB Studio Maker on October 16, 2026.

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