Quant trading platforms are gaining popularity among traders and investors who are seeking to automate their trading strategies and take advantage of quantitative analysis techniques. These platforms offer a range of tools and features that can help users develop and execute complex trading algorithms, backtest strategies, and access real-time market data.

When it comes to ranking the best quant trading platform apps, several factors come into play, including user experience, performance, features, and pricing. Here are some of the top quant trading platform apps that are currently leading the market:

1. QuantConnect: QuantConnect is a popular quant trading platform that offers a powerful algorithmic trading engine and a wide range of data sources and analytics tools. Users can code their trading strategies in C# or Python, backtest them using historical data, and deploy them in live trading environments. QuantConnect also offers a community forum where users can share ideas and collaborate on strategies.

2. Quantopian: Quantopian is another well-known quant trading platform that provides a platform for developing, testing, and deploying algorithmic trading strategies. Users can code their strategies in Python, backtest them using historical data, and access a range of financial data sources. Quantopian also offers a research environment where users can explore new trading ideas and collaborate with other users.

3. Alpaca: Alpaca is a commission-free trading platform that offers a range of APIs for algorithmic trading. Users can access real-time market data, execute trades, and manage their portfolios using Alpaca's platform. Alpaca also offers a paper trading environment where users can test their strategies without risking real money.

4. Interactive Brokers: Interactive Brokers is a well-established brokerage firm that offers a range of trading platforms for both retail and institutional clients. Their platform supports algorithmic trading through their API, allowing users to automate their trading strategies and access a wide range of financial instruments.

5. MetaTrader: MetaTrader is a popular trading platform that is widely used by retail traders and institutions alike. It offers a range of tools for technical analysis, charting, and algorithmic trading. Users can code their trading strategies in MQL4 or MQL5, backtest them using historical data, and deploy them in live trading environments.

In conclusion, the quant trading platform app rankings are constantly evolving as new platforms enter the market and existing ones improve their features and functionality. It is important for traders and investors to carefully evaluate their needs and preferences before choosing a quant trading platform that best suits their requirements.