Comparison

Deja vs Smart K

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
Read full description

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

Smart K

Features
Read full description

Smart K-Line helps active traders read price action faster with clean mobile-first candlestick analysis. Track a focused watchlist, review chart structure at a glance, and inspect support, resistance, channels, wedges, rectangles, and triangle formations in a visual format built for fast study and market observation. The app includes: - Single-candle, two-candle, and multi-candle pattern recognition - Structure overlays such as trendlines, channels, wedges, rectangles, and triangles - Multi-timeframe analysis for faster context switching - Full-screen chart viewing optimized for iPhone - A lightweight local watchlist with no account required Smart K-Line is designed to make technical structure easier to read, compare, and review on mobile.

Screenshots

Deja3 screens
Smart K3 screens

Verdict

The call

The clearest difference is device support: Deja at 3 against Smart K's 1. Deja also leads on iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences ยท 4 level
Deja versus Smart K: the parameters behind the verdict, then further details
ParameterDejaSmart K
PriceFreeFree
Update frequencyEvery 4 daysโ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS15.0 โ€” better17.0
Further details โ€” not scored
Size73 MB2 MB
Age rating4+4+
DeveloperJUHWAN LEEๅŽๅฅ‡ ๆฏ›

In-app purchases

None

Deja

No in-app purchases

None

Smart K

No in-app purchases

Questions

Is Deja free?
Deja is free to download, with no in-app purchases.
Is Smart K free?
Smart K is free to download, with no in-app purchases.
Do Deja or Smart K have ads?
Neither Deja nor Smart K shows ads.

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