MuStripKit vs CQDX 59
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MuStripKit
This app provides tools for analyzing and designing microstrip circuits. It calculates key parameters like input impedance and frequency response, and includes a Smith chart tool. It also features time-domain simulation of circuits with lumped elements and educational examples.
- Microstrip line analysis and synthesis
- Input impedance and reflection coefficient calculations
- Frequency response (S-parameters)
- Smith chart tool
- 1-D FDTD time-domain simulation
- Educational circuit examples
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MuStripKit is a versatile microstrip toolkit app for microstrip circuit analysis and design. The app realizes various functions, including microstrip line analysis and synthesis, calculations of input impedance, reflection coefficient, and frequency response in terms of S-parameters. A Smith chart tool is also provided to aid in designing a microstrip circuit. In addition, using a novel multiple 1-D FDTD method, the app shows time-domain simulation of microstrip circuits incorporated with lumped elements, including resistors, capacitors, and inductors in parallel, as well as series connections. Several educational circuit examples are provided to help illustrate the electromagnetic wave propagation in the microstrip circuit. For more information, please refer to "A Microstrip Circuit Tool Kit App with FDTD Analysis Including Lumped Elements," IEEE Microwave Magazine, vol. 16, no. 1, pp. 74-80, 2015. User interface: - touch on number field to input/change value - slider may be used to change value - swipe left/right to select circuit element - press 'Add'/'Del' to add/delete circuit element in schematic - tap to select circuit element in schematic - long press to move circuit element in schematic
CQDX 59
This app simulates amateur radio QSOs, allowing users to practice CQ calls and exchange signal reports. It offers realistic variations in call signs, voice quality, and signal levels for an authentic experience. Users can customize their own call sign and select various communication modes.
- QSO simulation for amateur radio
- Realistic call sign and voice variations
- Customizable own station call sign
- 59 style or AADX Contest Style QSO
- Phonetic code conversion
- Pile-up mode support
- QRN selection
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This App is a real QSO simulator for Amateur Radio(HAM). Reproduce “QSO for CQ call, and 59 report exchange". In addition, the call sign and the voice quality (tone, speech speed) signal level of the speaker differ for each QSO to provide realism. Furthermore, the call sign of your own station that issues CQ can be set arbitrarily. 【Characteristic】 1. 59 style QSO or AADX Contest Style QSO 2. All call signs are converted to phonetic codes 3.Pseudo signal meter 4.Status display showing TX / RX 5.Voice select function from YL / OM 6.Phonetic code select function 7.Support the Pile-up Mode 【Other features】 1. A function to select the number of QSOs to communicate. You can choose from 5 or 20. 2. A function to select QRN. ON / OFF can be selected. 3. A function to select the area of the call sign of the partner station. You can choose from JA USA or W / W. 4. Supports easy mode. The pitch and volume of the partner station are constant. 5. Function to clear score information You can delete the high score information that you have. Supported keyboard input from Apple Silicon Mac. [Support Key] A-Z, 0-9, / Enter:return ESC:esc BS:delete CQ:UpArrow AGN:DownArrow TU:[ LEFT:LeftArrow RIGHT:RightArrow
Screenshots
Verdict
The clearest difference is rating: CQDX 59 at 5.0 against MuStripKit's 4.5. CQDX 59 also leads on update cadence (every 3 weeks vs every 19 months). MuStripKit's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, review sentiment, ratings volume and in-app purchases 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.
CQDX 59 holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
MuStripKit ships an update every 19 months, CQDX 59 every 3 weeks. The most recent releases landed on June 11, 2026 and September 27, 2026 respectively.
| Parameter | MuStripKit | CQDX 59 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 19 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Eng Tan | koji kamogawa |
Customer experience
MuStripKit
CQDX 59
In-app purchases
MuStripKit
No in-app purchases
CQDX 59
No in-app purchases








