TC vs SevenFish
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TC
This utility app provides quick and accurate conversions between resistance, potential, and temperature for various thermocouples and RTDs. It supports offline use, temperature recording with export, and offers an intuitive interface for field technicians and engineers.
- Thermocouple and RTD conversion
- Supports multiple sensor types
- Offline functionality
- Temperature recording and charting
- Export data to Excel
- Intuitive user interface
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This software is a user-friendly, efficient, and comprehensive tool designed for field technicians, engineers, and programmers. It allows for quick and easy conversion between resistance potential and temperature, suitable for various common temperature sensors. This application simplifies the temperature measurement process, providing a practical solution for professionals. Data support: Supports thermocouple types B, E, J, K, N, R, S, T, C, D, G with all voltages measured in millivolts (mV). The conversion formulas used are derived from NIST thermocouple tables and coefficients. Supports bi-directional query for PT1000, PT100, PT500, PT800, PT10, CU50, CU100, Ni100, Ni120, Ni1000 RTDs (ITS-90). Temperature recording: Supports temperature recording and temperature curve display, with one-click export of records and charts to Excel, facilitating on-site data entry and analysis. Fast and accurate: Instantly obtain the temperature coefficients and performance curves you need. Offline availability: Can be queried in field environments without network access. Intuitive interface: Clean design, easy to operate. Regular updates: Always maintains the latest industry standards. Whether you're an industrial automation engineer, process control expert, factory instrument engineer, or a student of temperature measurement, TC-RTD is an indispensable assistant for you.
SevenFish
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This app works with a wireless sonar transducer, turning your mobile device into a professional underwater detection system. Whether you’re shore fishing, boating, or ice fishing, you can access real-time underwater data to enhance your fishing efficiency and experience. Key Features: Real-Time Sonar Imaging Clearly displays underwater structures, fish location and size with dynamic updates, helping you accurately identify promising fishing spots. Water Depth & Temperature Monitoring Precisely measures current water depth and temperature with real-time updates, giving you instant insight into changing water conditions. Fish Detection & Display Smartly identifies fish and intuitively shows their size and position, keeping you fully informed of fish activity. Fishing Spot Map Saving Save your favorite fishing spots and mark them on the map for easy navigation and quick return on future trips. 100-Level Sensitivity Adjustment Fine-tune sensitivity from 1 to 100 levels to adapt to different water clarity and depth conditions, ensuring stable and reliable sonar signals. Elegant UI Design Clean, intuitive interface with a dark theme suitable for outdoor use, reducing eye strain during long fishing sessions. This app is an essential tool for fishing enthusiasts, professional anglers, and underwater detection users. Paired with a compatible wireless sonar transducer, you can easily build your own portable underwater detection system.
Screenshots
Verdict
The clearest difference is price: SevenFish at Free against TC's $1.99. TC's advantage is iOS requirement (13.0 vs 15.6). On ads, 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
SevenFish is free to download; TC costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | TC | SevenFish |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 12 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | 立娜 王 | 定敢 刘 |
In-app purchases
TC
No in-app purchases
SevenFish
No in-app purchases









