Comparison

Deja vs PatternFusion

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Deja

Features
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Have you ever looked at a stock chart and thought, "I have seen this pattern before"? Deja finds historical charts that match your current pattern and shows you what happened next. Deja scans thousands of historical price patterns across stocks and crypto to find the ones most similar to the chart you are looking at right now. Then it tells you, with real statistics, how those similar patterns played out -- whether prices went up or down, and by how much. CORE FEATURES -- Pattern Matching Engine Deja identifies similar historical chart patterns across NASDAQ, NYSE, and crypto markets. Each match includes a similarity score so you know how closely it resembles the current chart. -- Statistical Predictions For each set of matched patterns, Deja calculates 1-day and 5-day predictions including win rate, maximum gain, maximum loss, IQR range, and median outcomes. No guesswork -- just data. -- Interactive Comparison Charts Overlay the current chart with any historical match to visually compare how patterns align. Switch between line and OHLC views. See exactly where the "similar part" is and what happened after. -- Customizable TP/SL Levels Set your Take Profit and Stop Loss using the metric that fits your trading style -- Max, Min, IQR bounds, or Median values. The chart updates in real time to show your selected levels. -- Live Price Data Real-time price updates via WebSocket with historical data merged seamlessly. Watch the current pattern develop as it happens. -- Multi-Market Coverage Browse and analyze charts from NASDAQ, NYSE, NYSE-ARCA, and major cryptocurrency pairs. HOW TO USE 1. Select a market category and symbol 2. View the live candlestick chart with prediction overlays 3. Scroll down to see the full statistical analysis 4. Explore individual similar chart matches 5. Use the data to inform your trading decisions Deja does not predict the future. It shows you what historically happened when similar patterns appeared. Use this information as one input in your trading analysis. Download Deja and start making data-driven trading decisions.

About

PatternFusion

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Master technical analysis with PatternFusion โ€” learn patterns, predict the move, practice with virtual money and analyze charts with AI. Designed for stock and crypto enthusiasts, PatternFusion is built around a dual core so every trader can effectively learn and apply chart patterns. LEARN PATTERNS: โ€“ Step-by-Step Lessons: Learn the fundamentals of chart patterns, candlesticks and harmonic patterns through clear lessons โ€” head & shoulders, triangles, flags, double tops and more. โ€“ Technical Indicators: Build stronger analysis with EMA, MACD, RSI and beyond. โ€“ Pattern Quiz: Test your knowledge risk-free and sharpen your pattern-recognition skills. PREDICT & PRACTICE: โ€“ Pattern Hunter: Study real market charts and predict which way price goes next. Build your streak and beat your best score. โ€“ Practice with Virtual Money: Trade a risk-free portfolio and test your strategy before real markets. ANALYZE WITH AI: โ€“ Chart Analysis: Upload a screenshot of any chart and get an instant AI-powered analysis. Choose a short, medium or long-term horizon. KEY FEATURES: โ€“ Expert-crafted pattern lessons โ€“ Interactive quizzes and daily progress โ€“ A global leaderboard โ€“ Full support for 9 languages PatternFusion is made for anyone serious about sharpening their analysis skills. Whether you're just starting or refining your strategy, it's your step toward mastering technical analysis. Ready to unlock the power of patterns? Download PatternFusion now! PatternFusion is an educational tool. It helps you learn and practice technical analysis and does not provide investment or financial advice. Privacy Policy: https://dahitech.io/

Screenshots

Deja3 screens
PatternFusion4 screens

Verdict

The call

The clearest difference is in-app purchases: Deja at none against PatternFusion's 4. Deja also leads on ads (none vs shown) and update cadence (every 4 days vs every 10 days). On price and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. PatternFusion sells 4 in-app purchases, starting at $2.99 per 7 days. Deja asks for nothing beyond the download.

UpkeepUpdate frequency

Deja ships an update every 4 days, PatternFusion every 10 days. The most recent releases landed on September 15, 2026 and September 4, 2026 respectively.

Scorecard4 real differences ยท 2 level
Deja versus PatternFusion: the parameters behind the verdict, then further details
ParameterDejaPatternFusion
PriceFreeFree
Update frequencyEvery 4 days โ€” betterEvery 10 days
AdsNo โ€” betterYes
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS15.0 โ€” better17.0
Further details โ€” not scored
Size73 MB42 MB
Age rating4+17+
DeveloperJUHWAN LEEMUHAMMED MERT TOPRAK

In-app purchases

None

Deja

No in-app purchases

4 purchases

PatternFusion

Subscriptions2
  • Weekly Premium$2.997 Days
  • Monthly Premium$3.991 Month
One-time2
  • 5 Analyse Package$0.99
  • 10 Analyse Package$1.99

Questions

Is Deja free?
Deja is free to download, with no in-app purchases.
Is PatternFusion free?
PatternFusion is free to download, with in-app purchases available.
Do Deja or PatternFusion have ads?
PatternFusion shows ads; Deja does not.
Which is updated more often, Deja or PatternFusion?
Deja ships an update every 4 days, and PatternFusion every 10 days. Most recently, Deja was updated on September 15, 2026 and PatternFusion on September 4, 2026.

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