555 Calc vs Capacitor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
555 Calc
This utility app helps engineers and hobbyists calculate resistor values for circuits using the Timer IC 555. Simply input frequency, duty ratio, and capacitor values to get the required resistor outputs.
- Calculate resistor values
- Input frequency
- Input duty ratio
- Input capacitor value
- Timer IC 555 circuit design
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This App calculates registors value, when designing the circuit using Timer IC 555. How to (1) Input Frequency value. (2) Input Duty Ratio. (3) Input C1 Value. (4) Touch ‘Calculate’ button. (5) Registors value will be displayed. Note. * Set Duty Ratio to 50 ~ 99. * If you set Duty Ratio to 50, R1 value will be set to 0.
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.
- 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
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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
Verdict
The clearest difference is review sentiment: Capacitor at 100% against 555 Calc's 50%. Capacitor also leads on rating (4.8 vs 4.0) and ads (none vs shown). 555 Calc's advantage is iOS requirement (11.0 vs 26.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Capacitor holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 3 and 10 respectively. Written reviews point the same way: 50% of 555 Calc's written reviews are positive against 100% of Capacitor's.
555 Calc ships an update every 20 months, Capacitor every 40 months. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | 555 Calc | Capacitor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) | 4.8 (10 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 10 — better |
| Update frequency | Every 20 months — better | Every 40 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 18 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Jibiki Works | Gerhard Lentschik |
Customer experience
555 Calc
Capacitor
In-app purchases
555 Calc
No in-app purchases
Capacitor
No in-app purchases
Questions
Is 555 Calc free?
Is Capacitor free?
Which has better reviews, 555 Calc or Capacitor?
Do 555 Calc or Capacitor have ads?
Which is updated more often, 555 Calc or Capacitor?
Other comparisons
