Principle vs Backtest Trading
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Principle
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How long will you keep investing on gut feeling? Build your trading rules without code. Test them on US and Korean stocks. Combine moving averages, stop-loss, and partial take-profit to backtest your strategy. For education and entertainment only. Past simulation does not predict future results. Build rules. Let the data answer. -- Rule Builder - Set moving average periods, stop-loss, and take-profit with a few taps - No coding required, ready in 1 minute - Combine partial buy/sell, multi-stage take-profit, and more -- Historical Backtest - US and Korean daily stock data - 1 token per stock - Cached results reuse on identical conditions (no extra token) -- Result Analysis - Cumulative return chart - Buy/sell signal markers on the price chart - Maximum drawdown, win rate, average holding period and more -- Share Your Rules - Share your rules with friends - Import rules from others and backtest them yourself -- Invite Friends - Verify more, together - Share your invite code; when a friend signs up and enters it, - you and your friend each get 15 tokens (up to 10 invites per month) -- Token Packs - 4 token packs: 10 / 33 / 115 / 600 tokens - Larger packs include more bonus tokens -- Disclaimer - This app is an education and entertainment simulation tool. - This app does NOT provide investment advice, stock picks, or trading signals. - Backtest results are simulations based on past data and do not guarantee future returns. - This app is NOT connected to live trading. - The company assumes no responsibility for any losses in actual trading.
Backtest Trading
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Research your next Futures strategy with favorite pairs, candle charts, historical backtests, and a community of shared methods. START WITH YOUR MARKET Choose favorite pairs and a timeframe. Open community methods filtered for that market, or go straight to a backtest with the pair and timeframe already selected when there is no matching data. READ THE CHART Explore candlestick charts and indicators. Choose chart intervals from 1 minute where the data source supports them. Chart availability, history and refresh frequency depend on the market and provider. TEST THE RULES Start with MACD or another template, or build entry and exit rules visually. Set your backtest assumptions, including position size, leverage, fees, slippage, stop loss and take profit. Inspect entries, exits, individual trades, return and drawdown. Save results to compare your changes. SHARE AND RECHECK Publish eligible profitable backtests to the community after the server checks the strategy with a historical simulation. View your shared-method history and publication status. Explore another method, inspect its evidence and rerun it with your own settings. A profitable historical result is not a trade recommendation. KNOW THE DATA The app uses public market-data sources, including Binance data for supported crypto markets. Gold, silver and some other views may use a displayed proxy instrument when direct data is unavailable. A proxy is not the original spot market. Data may be delayed or incomplete. Backtest is a research tool, not a broker or financial adviser. It does not place real-money trades or guarantee profit. Simulated results depend on data and assumptions; past performance does not predict future results. Some features require an account or a subscription with higher usage limits. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Backtest Trading at none against Principle's shown. Backtest Trading also leads on update cadence (every 3 days vs every 10 days) and device support (4 vs 2). Principle's advantage is iOS requirement (13.0 vs 17). On price and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Principle sells 4 one-off in-app purchases and Backtest Trading sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Principle ships an update every 10 days, Backtest Trading every 3 days. The most recent releases landed on September 29, 2026 and October 17, 2026 respectively.
| Parameter | Principle | Backtest Trading |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Every 3 days β better |
| Ads | Yes | No β better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPad, Mac, Apple Watch β better |
| Requires iOS | 13.0 β better | 17 |
| Further details β not scored | ||
| Size | 49 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | μ£Όμνμ¬ μ μ | Dat Thanh Nguyen |
In-app purchases
Principle
- 10 Tokens$1.99
- 33 Tokens$4.99
- 115 Tokens$14.99
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- 600 Tokens$59.99
Backtest Trading
- StopTrading Pro3 Days trial$9.991 Month
- StopTrading Power3 Days trial$29.991 Month
- StopTrading Pro Annual$79.991 Year
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- StopTrading Power Annual$239.991 Year
Questions
Is Principle free?
Is Backtest Trading free?
Do Principle or Backtest Trading have ads?
Which is updated more often, Principle or Backtest Trading?
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