Comparison

Deja vs LumQuant

Price, ratings, monetisation and update history for both apps, side by side — 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

LumQuant

Analyze gold, forex, and index charts with AI-driven market insights. Understand current market states, identify potential shifts, and assess risk conditions with objective indicators and historical data. Ask follow-up questions in plain language for deeper analysis.

Highlights
  • Market analysis for gold, forex, and indices
  • Multi-timeframe chart readings
  • Objective technical indicators
  • Market state identification
  • Risk condition assessment
  • Historical reach statistics
  • AI-powered follow-up questions
Read full description

LumQuant is a market research tool for people who study gold, forex and index charts. It answers one question well: what is the market doing right now, and what would have to change for that to flip? WHAT YOU GET • One screen per market — gold, silver, major and cross FX pairs, indices • Multi-timeframe reading — M15, M30 and H1 analysed together, never in isolation • Objective indicators — EMA structure, ADX trend strength, MACD momentum, RSI, ATR volatility, Bollinger width, VWAP position • Market state, not just numbers — trending up, trending down, range, compression • Six rule checks shown with real values, so you can see which conditions hold and which do not • Risk conditions stated in advance — what would invalidate the current reading • Historical reach statistics — how often price has travelled a given distance from a given level, measured over tens of thousands of candles • Ask-the-AI follow-ups — ask about trend, key levels or risk in plain language, with or without a chart screenshot HOW IT WORKS Every reading comes from market data plus deterministic calculations. Nothing is invented. Where a number is unavailable, it is shown as a dash rather than estimated. WHAT IT IS NOT LumQuant is a research and study tool. It does not execute trades, does not connect to your broker, does not hold funds, and does not provide investment advice. It never asks for brokerage, exchange or bank credentials, API keys or private keys. TWELVE LANGUAGES Simplified Chinese, Traditional Chinese, English, Japanese, Korean, Spanish, Portuguese, Russian, German, French, Turkish and Indonesian. Disclaimer: LumQuant is a market research tool. It does not execute trades and does not constitute investment advice. Markets carry risk; make your own decisions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Deja3 screens
LumQuant4 screens

Verdict

The call

The clearest difference is in-app purchases: Deja at none against LumQuant's 9. Deja also leads on update cadence (every 4 days vs every 10 days) and device support (3 vs 1). On price and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. LumQuant sells 9 in-app purchases, starting at $19.99 per month. Deja asks for nothing beyond the download.

UpkeepUpdate frequency

Deja ships an update every 4 days, LumQuant every 10 days. The most recent releases landed on September 15, 2026 and September 30, 2026 respectively.

Scorecard4 real differences · 6 level
Deja versus LumQuant: the parameters behind the verdict, then further details
ParameterDejaLumQuant
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 4 days — betterEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size73 MB5 MB
Age rating4+17+
DeveloperJUHWAN LEE宠 李

In-app purchases

None

Deja

No in-app purchases

9 purchases

LumQuant

Subscriptions6
  • LumQuant Basic Monthly$19.991 Month
  • LumQuant Pro Monthly$39.991 Month
  • LumQuant Ultra Monthly$79.991 Month
Show 3 more
  • LumQuant Basic Yearly$149.991 Year
  • LumQuant Pro Yearly$299.991 Year
  • LumQuant Ultra Yearly$599.991 Year
One-time3
  • 100 Credits$9.99
  • 500 Credits$39.99
  • 2000 Credits$119.99

Questions

Is Deja free?
Deja is free to download, with no in-app purchases.
Is LumQuant free?
LumQuant is free to download, with in-app purchases available.
Do Deja or LumQuant have ads?
Neither Deja nor LumQuant shows ads.
Which is updated more often, Deja or LumQuant?
Deja ships an update every 4 days, and LumQuant every 10 days. Most recently, Deja was updated on September 15, 2026 and LumQuant on September 30, 2026.

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