RC Circuit vs レコーダー
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RC Circuit
Calculate RC charging and filter circuits, including time constants and cutoff frequencies. Find component values from these parameters or get voltage at specific times. Save and share data easily.
- Calculate time constant
- Find component values
- Get voltage at time t
- Calculate cutoff frequency
- Save data to CSV
- Upload CSV via AirDrop/iCloud Drive
- Multi-language support
Read full descriptionHide full description
This app is used to calculate the RC charging and RC filter circuit. It is suitable for hobbyist or electronic engineer. Features * Calculate time constant from R, C * Find component value R,C from time constant * Get voltage at time t in RC charging / discharging * Calculate cutoff frequency by R, C * Find component value R,C from cutoff frequency * Save data to CSV files * Upload CSV via AirDrop / iCloud Drive * Support English, Traditional Chinese, Simplified Chinese, German, French, Italian, Spanish, Portuguese, Japanese
レコーダー
Read full descriptionHide full description
スピークバディ パーソナルコーチング用の音声録音アプリです。
Screenshots
Verdict
The clearest difference is in-app purchases: レコーダー at none against RC Circuit's 1. RC Circuit's advantage is update cadence (every 6 months vs every 20 months). On price, ads, 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
Both are free to download. RC Circuit sells 1 one-off in-app purchase. レコーダー asks for nothing beyond the download.
RC Circuit ships an update every 6 months, レコーダー every 20 months. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.
| Parameter | RC Circuit | レコーダー |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 6 months — better | Every 20 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 12.2 |
| Further details — not scored | ||
| Size | 16 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | SpeakBUDDY Ltd. |
In-app purchases
RC Circuit
- Unlock Pro features$0.99
レコーダー
No in-app purchases
