Comparison

Timer 555 Calculator vs Capacitor

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

Calculate monostable and astable circuits for electronics projects. Determine pulse width and frequency, find component combinations, and save/upload data. Supports multiple languages.

Highlights
  • Monostable circuit pulse width calculation
  • Astable circuit frequency calculation
  • Component combination finder
  • Save component values to CSV
  • Upload CSV via AirDrop/iCloud Drive
  • Multi-language support
Features
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 * Saving component values in CSV file * Upload generated CSV files via AirDrop or iCloud Drive * Support English, German, French, Italian, Spanish, Portuguese, Japanese, Korean, Russian

About

Capacitor

Easily determine capacitor values from color codes or calculate color codes from values. Supports both standard and SMD capacitors, providing quick and accurate conversions for electronics projects.

Highlights
  • Capacitor color code to value conversion
  • Value to capacitor color code conversion
  • SMD capacitor code to value conversion
  • SMD value to EIA code calculation
  • Supports standard and SMD capacitors
Features
Read full description

The Capacitor Converter is the perfect tool for anyone working with electronics – from hobbyists and students to professional technicians. Simply select the color bands and instantly see the corresponding capacitor value. Or enter a value and let the app calculate the correct color bands automatically. SMD capacitors are fully supported as well: enter the capacitor code → the value is calculated. Enter the value → the matching EIA code is generated. The app works completely offline, is fast, intuitive, and requires no registration. Perfect for workshops, labs, education, and DIY electronics projects. Key Features: Select color bands → instantly get the capacitor value Enter a value → automatically get the correct color bands Supports SMD capacitor codes: EIA‑3, EIA‑4, and EIA‑96 Fully offline, no registration required Ideal for electronics hobbyists, students, and professionals Clean interface and fast workflow The Capacitor Converter makes working with capacitor values easier, faster, and more reliable.

Screenshots

Timer 555 Calculator4 screens
Capacitor4 screens

Verdict

The call

The clearest difference is rating: Capacitor at 4.8 against Timer 555 Calculator's 3.9. Capacitor also leads on in-app purchases (none vs 1). Timer 555 Calculator's advantage is update cadence (every 3 months vs every 40 months) and iOS requirement (13.2 vs 26.0). On price, review sentiment, ratings volume and ads 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. Timer 555 Calculator sells 1 one-off in-app purchase. Capacitor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Capacitor holds the better App Store score, 4.8 against 3.9. Both are backed by a comparable volume of ratings — 8 and 10 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Timer 555 Calculator ships an update every 3 months, Capacitor every 40 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Timer 555 Calculator versus Capacitor: the parameters behind the verdict, then further details
ParameterTimer 555 CalculatorCapacitor
PriceFreeFree
Rating3.9 (8 ratings)4.8 (10 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings810 — better
Update frequencyEvery 3 months — betterEvery 40 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.2 — better26.0
Further details — not scored
Size3 MB8 MB
Age rating4+4+
DeveloperSiu Yuen HoGerhard Lentschik

Customer experience

Timer 555 Calculator

All ratings8 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Capacitor

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Timer 555 Calculator

One-time1
  • Unlock Pro feature$0.99
None

Capacitor

No in-app purchases

Questions

Is Timer 555 Calculator free?
Timer 555 Calculator is free to download, with in-app purchases available.
Is Capacitor free?
Capacitor is free to download, with no in-app purchases.
Which has better reviews, Timer 555 Calculator or Capacitor?
Capacitor is rated higher. Timer 555 Calculator averages 3.9 out of 5 from 8 ratings, while Capacitor averages 4.8 from 10 ratings.
Do Timer 555 Calculator or Capacitor have ads?
Neither Timer 555 Calculator nor Capacitor shows ads.
Which is updated more often, Timer 555 Calculator or Capacitor?
Timer 555 Calculator ships an update every 3 months, and Capacitor every 40 months. Most recently, Timer 555 Calculator was updated on October 21, 2026 and Capacitor on October 24, 2026.

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