FCD vs ChatPro4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FCD
This application calibrates engine gauges for turboprop aircraft using an iPad. It connects via Bluetooth to a specialized adapter plugged into the back of the gauges, allowing full control of calibration parameters and download of flight log data.
- iPad-based calibration
- Bluetooth connectivity
- Control calibration parameters
- Download flight log data
- Supports TR1 engine gauges
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iPad based calibration app for the Electronics International Inc line of Turboprop 2 inch round engine gauges. The FCD-TR1 adapter is a BLE (BlueTooth) device that can be plugged directly into the back of any of the TR1 instruments and then controlled by this app via a BLE (BlueTooth) connection. All calibration parameters of the TR1 are accessible via this app. In addition, recorded flight log data can be downloaded to the iPad.
ChatPro4
Engage in natural conversations with an AI assistant for advice, information, and creative tasks. It offers writing assistance, translation, planning, and programming help, powered by an advanced AI model with vision and speech-to-text capabilities.
- Advanced AI model (4.0)
- Vision modeling for picture conversations
- Speech-to-text for efficiency
- Streaming output for reduced waiting
- Role-playing and dialog scenarios
- Contextualization and multi-line switching
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ChatPro4 is a smart Q&A app based on artificial intelligence technology that allows you to have natural conversations. Whether you want to get advice, find answers to your questions, chat about the news, or plan for the future, ChatPro4 has you covered. It specializes in a variety of tasks such as writing essays, song lyrics, resumes, travel planning, language translation, recipe recommendations, programming guidance, and much more. Key features of ChatPro4 include: - Advanced 4.0 model for a smarter user experience. - Support Vision modeling and experience picture conversations. - Support speech-to-text function to improve work efficiency. - Streaming output to reduce waiting time. - Supports features such as contextualization and split lines. - You can play different roles and experience different dialog scenarios. - Multi-line switching to reduce line problems. Support more functions in the future Whether you want to find an answer, have an interesting conversation, or need an intelligent assistant to help complete a task, ChatPro4 is able to meet the needs of users and provide them with a high-quality intelligent conversation experience. Download ChatPro4 and start a journey of intelligent conversation! Do not enter personal information. Offensive or dangerous content may be generated. ChatPro4 is not responsible for the content generated. Subscription Instructions: - Users may subscribe to full functionality with unlimited access; - Subscriptions are charged on an annual basis and will be deducted from the User's iTunes account when the User confirms the purchase; - Users may turn off auto-renewal of a subscription 24 hours before the end of the current subscription, or the subscription will automatically renew; - An Apple ID with an auto-renewing subscription will be automatically charged to the iTunes Account 24 hours prior to the expiration of each billing cycle and extended for the corresponding period of validity; - User-managed subscription services, i.e., after purchase, you can go to your user account and set up a way to turn off automatic subscriptions. Privacy Policy: https://sites.google.com/view/chatpro4privacy/%E9%A6%96%E9%A1%B5 Usage Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is in-app purchases: FCD at none against ChatPro4's 3. FCD also leads on ads (none vs shown). ChatPro4's advantage is update cadence (every 3 weeks vs every 7 months). On price, rating, ratings volume 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. ChatPro4 sells 3 in-app purchases, starting at $4.99 per 7 days. FCD asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for FCD against 5.0 for ChatPro4. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
FCD ships an update every 7 months, ChatPro4 every 3 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | FCD | ChatPro4 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 7 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.4 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 17 MB |
| Age rating | 4+ | 12+ |
| Developer | Ross Morrison | Qijie Information |
Customer experience
FCD
ChatPro4
In-app purchases
FCD
No in-app purchases
ChatPro4
- Weekly Plus$4.997 Days
- Monthly Plus$11.901 Month
- Annual Plus$89.991 Year









