Comparison

Chart AI vs Deja

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

Head to head
About

Chart AI

Features
Read full description

AI-Powered Chart Analysis for Smarter Trading Chart AI helps traders understand price action with clear, AI-powered chart analysis. Simply upload a screenshot of your trading chart and receive instant insights into trends, patterns, and key levels. Designed for forex, crypto, and stock traders, Chart AI acts as a second set of eyes β€” helping you review setups, reduce guesswork, and trade with more confidence. Key Features - Upload chart screenshots for instant analysis - Identifies trends, support and resistance, and chart patterns - Provides objective, data-based insights - Includes simple explanations to help you learn technical analysis How It Works - Capture a chart screenshot - Upload it to Chart AI - Review the AI-generated breakdown Transparency & Disclaimer Chart AI uses OpenAI’s official APIs to power certain AI features but is not affiliated with or endorsed by OpenAI. The app operates independently and is not associated with any government or political organization. All insights and content are provided for educational and informational purposes only and should not be considered financial or investment advice. Subscription Information Chart AI is a paid, subscription-based application. A valid subscription is required to access premium features and AI-powered analysis. Subscription pricing and terms are clearly shown within the app and can be managed through your Apple ID settings. For More Information, See Our: - Term Of Use: https://sites.google.com/view/chartaiiostermofuse/home - Privacy Policy: https://sites.google.com/view/chartaiiosprivacypolicy/home

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.

Screenshots

Chart AI4 screens
Deja3 screens

Verdict

The call

The clearest difference is in-app purchases: Deja at none against Chart AI's 3. Deja also leads on ads (none vs shown) and update cadence (every 4 days vs every 6 weeks). Chart AI's advantage is iOS requirement (13.0 vs 15.0). On price and device support 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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Chart AI sells 3 in-app purchases, starting at $4.99 per 7 days. Deja asks for nothing beyond the download.

UpkeepUpdate frequency

Chart AI ships an update every 6 weeks, Deja every 4 days. The most recent releases landed on September 7, 2026 and September 15, 2026 respectively.

Scorecard4 real differences Β· 2 level
Chart AI versus Deja: the parameters behind the verdict, then further details
ParameterChart AIDeja
PriceFreeFree
Update frequencyEvery 6 weeksEvery 4 days β€” better
AdsYesNo β€” better
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 β€” better15.0
Further details β€” not scored
Size58 MB73 MB
Age rating4+4+
DeveloperAwan JunctionJUHWAN LEE

In-app purchases

3 purchases

Chart AI

Subscriptions3
  • Weekly Premium$4.997 Days
  • Weekly3 Days trial$4.997 Days
  • Monthly Premium$14.991 Month
None

Deja

No in-app purchases

Questions

Is Chart AI free?
Chart AI is free to download, with in-app purchases available.
Is Deja free?
Deja is free to download, with no in-app purchases.
Do Chart AI or Deja have ads?
Chart AI shows ads; Deja does not.
Which is updated more often, Chart AI or Deja?
Chart AI ships an update every 6 weeks, and Deja every 4 days. Most recently, Chart AI was updated on September 7, 2026 and Deja on September 15, 2026.

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