RCircuitCalc vs Countdown & Visual Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RCircuitCalc
This app helps engineers and students design electrical and electronic circuits by calculating standard resistance values based on E-series numbers. It supports various circuit types, including voltage dividers, series, parallel, and combination circuits, and can also calculate current and power for each resistor.
- Calculates standard resistance values
- Supports voltage dividers, series, parallel, and combination circuits
- Calculates current and power for resistors
- Outputs resistance values based on E-series numbers (E6, E12, E24, E48, E96)
- Calculations based on input voltage, output voltage, current, and resistance ratio
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This application is intend for engineers and students who are wasting time for designing electric and electronic circuits. The standard resistance values based on E-series numbers are outputted in inputting necessary conditions such as input voltage, output voltage, current and so on. Features The calculable circuits are as follows: - Voltage Dividers (Inputting output voltage or resistance ratio) - Series Circuits - Parallel Circuits - Combination Circuits In the Voltage Dividers, resistance values are calculated in entering input voltage, output voltage or resistance ratio, and current into input boxes, besides, the most suitable resistance values are calculated in selecting priority whether Normal or Vout. In the Series Circuits, Parallel Circuits and Combination Circuits, divided resistance values are calculated in entering a combined resistance value into an input box. Calculated resistance values are displayed with the following E-series number specified either. E6, E12, E24, E48, E96 This application is able to calculate current and power of each resistor on calculated resistance values. Attention Because standard resistors are used and precision of calculation is ensured, the following restrictions are set up. - Range of resistance value: 1Ω ~ 10MΩ - Range of resistance ratio: 0.1 ~ 10
Countdown & Visual Timer
This app helps you track important dates and events with customizable countdowns and timely reminders. It offers unlimited event creation and a count-up feature for past occasions. Personalize your countdowns with custom backgrounds and home screen widgets.
- Customizable countdowns
- Timely reminders
- Unlimited event creation
- Count up from past events
- Customizable backgrounds
- Home screen widget
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Countdown is a free, user-friendly countdown timer and reminder app designed to help you keep track of all your important events and dates. Key Features: Home Screen Widget: Stay on top of your upcoming events by placing our customizable widget directly on your Home Screen (Premium feature on iOS 14). Customizable Backgrounds: Choose any color for your countdown background to suit your style. Timely Reminders: Get notified when it's time for your event, plus optional reminders 1 day or 1 week before. Unlimited Event Creation: Add as many events as you'd like—no limits! Count Up from Past Events: Look back on memorable moments with the count-up feature on each countdown page. Plan for any occasion: vacations, birthdays, holidays, parties, Thanksgiving, Christmas, Halloween, cruises, weddings, anniversaries, births, graduations, pregnancies, trips, new homes, retirements, concerts, goals, and much more! Privacy Policy: https://byteblocksdigital.com/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Countdown & Visual Timer at Free against RCircuitCalc's $1.99. Countdown & Visual Timer also leads on rating (4.0 vs 1.0) and update cadence (every 2 days vs every 17 months). RCircuitCalc's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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
Countdown & Visual Timer is free to download; RCircuitCalc costs $1.99 up front. Countdown & Visual Timer sells 1 one-off in-app purchase. RCircuitCalc asks for nothing beyond the download.
Countdown & Visual Timer holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: RCircuitCalc has 5 ratings behind it against 1, so its average is the more settled of the two.
RCircuitCalc ships an update every 17 months, Countdown & Visual Timer every 2 days. The most recent releases landed on June 8, 2026 and September 17, 2026 respectively.
| Parameter | RCircuitCalc | Countdown & Visual Timer |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 1.0 (5 ratings) | 4.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 17 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.6 — better | 15.6 |
| Further details — not scored | ||
| Size | 7 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | TAKAHIKO FUKUYAMA | ByteBlocks, LLC |
Customer experience
RCircuitCalc
Countdown & Visual Timer
In-app purchases
RCircuitCalc
No in-app purchases
Countdown & Visual Timer
- Countdown$3.99
Questions
Is RCircuitCalc free?
Is Countdown & Visual Timer free?
Which has better reviews, RCircuitCalc or Countdown & Visual Timer?
Do RCircuitCalc or Countdown & Visual Timer have ads?
Which is updated more often, RCircuitCalc or Countdown & Visual Timer?
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