RC Circuit vs 小灵龙App
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
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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
小灵龙App
This app provides comprehensive mobile services for campus cards, including traditional card functions like consumption and authentication, enhanced with QR code capabilities. It offers features for managing your campus card, paying various campus fees, and booking campus facilities.
- Campus card management
- QR code functionality
- Campus fee payments
- Facility booking
- Card application and registration
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【小灵龙】是一款面向校园的一卡通服务APP，在传统卡消费、认证的基础上增加了二维码功能，为校园用户提供专业、全面的移动一卡通服务。 【校园卡管理】 提供全面的校园卡服务，充值、信息查询、账单查询、流水查询、挂失／解挂、失卡招领、校园卡在线申请、校友注册等 【校园缴费】 项目缴费、电费、网费、辅修费、等级考试费、党团费、培训费、学费 【校园预订】 为校内餐厅、场馆、会议室、自习室等场所提供预订服务
Screenshots
Verdict
The clearest difference is rating: RC Circuit at 4.8 against 小灵龙App's 1.0. RC Circuit also leads on ads (none vs shown). 小灵龙App's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 6 months). On price, ratings volume, monetization model 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. RC Circuit sells 1 one-off in-app purchase. 小灵龙App asks for nothing beyond the download.
RC Circuit holds the better App Store score, 4.8 against 1.0. Both are backed by a comparable volume of ratings — 5 and 12 respectively.
RC Circuit ships an update every 6 months, 小灵龙App monthly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | RC Circuit | 小灵龙App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | 1.0 (12 ratings) |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | 5 | 12 — better |
| Update frequency | Every 6 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 157 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | 北京新中新诚通信息技术股份有限公司 |
Customer experience
RC Circuit
小灵龙App
In-app purchases
RC Circuit
- Unlock Pro features$0.99
小灵龙App
No in-app purchases
