Line vs Julius AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Line
This app models the relationship between two variables using linear regression. It fits a linear equation to observed data, calculating the slope, intercept, correlation coefficient, and coefficient of determination to assess the model's fit.
- Linear regression modeling
- Calculate slope and intercept
- Correlation coefficient calculation
- Coefficient of determination (R2)
- Model fit assessment
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The Line-Fit app uses linear regression to model the relationship between two variables (x and y) by fitting a linear equation to observed data. One variable is considered to be an explanatory (independent) variable, and the other is considered to be a response (dependent) variable. A linear regression line has an equation of the form Y = a + bX, where X is the explanatory variable and Y is the dependent variable. The slope of the line is b, and the intercept is a (the value of y when x = 0). To measure the association between the two variables the correlation coefficient is used, which is a value between -1 and 1 indicating the strength of the association of the observed data for the two variables. The coefficient of determination, R2, measures how close the data are to the fitted regression line. In general, higher values of R2 indicate a better fit of the model to the given data. R2 is always positive and equal to 1.0 for a perfect fit.
Julius AI
This AI-powered assistant analyzes data from spreadsheets and CSV files, creating dynamic graphs and providing step-by-step calculus solutions. It helps transform raw data into meaningful insights for informed decision-making.
- AI-powered data analysis
- Spreadsheet and CSV support
- Dynamic graph generation
- Data manipulation tools
- Step-by-step calculus solutions
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Julius is your AI-powered data analyst and math helper, leveraging ChatGPT and Anthropic alongside other leading technologies. Julius is adept at handling various data formats such as CSV, Excel, and Google Sheets. Simply upload or link your spreadsheets, and let Julius dive into the depths of your data. Key Features: - Versatile Data Analysis: Effortlessly upload or link your spreadsheet for analysis. - Dynamic Graph Maker: Generate both basic and advanced charts tailored to your specific data visualization needs. - Data Manipulation Made Easy: Group, filter, and transform your data with intuitive controls. - Calculus Solver: Julius is the best math helper, with step-by-step solutions With Julius AI, you don't just analyze data; you unlock its true potential. Transform the raw data in your spreadsheet or CSV into meaningful insights, create compelling models, generate clean graphs, and make informed decisions with ease. Experience the future of data analysis today! Terms of Use for Julius AI: Math Helper & Graph Maker: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Julius AI at 68% against Line's 0%. Julius AI also leads on rating (4.8 vs 3.7) and update cadence (every 9 days vs every 41 months). Line's advantage is in-app purchases (none vs 10). On price, ads, device support and iOS requirement 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
Both are free to download. Julius AI sells 10 in-app purchases, starting at $17.99 per month. Line asks for nothing beyond the download.
Julius AI holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Julius AI has 398 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Line's written reviews are positive against 68% of Julius AI's.
Line ships an update every 41 months, Julius AI every 9 days. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | Line | Julius AI |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.8 (398 ratings) — better |
| Positive reviews | 0.0% of reviews | 68.1% of reviews — better |
| Number of ratings | 3 | 398 — better |
| Update frequency | Every 41 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 18 MB |
| Age rating | 12+ | 4+ |
| Developer | Bjarne Berge | Caesar Labs |
Customer experience
Line
Julius AI
Bugs and requests
Line
Not enough reviews yet to summarise bugs or requests.
Julius AI
Reported bugs
4 issues- White screen on app launch
- Freezing and crashing issues
- Inability to open the app after updates
- Incorrect statistical analysis and data interpretation
Requested features
4 requests- Support for landscape mode on iPad
- Improved memory retention and consistency
- Better database integration and recognition of columns
- Ability to read PDFs and handwritten notes
In-app purchases
Line
No in-app purchases
Julius AI
- Basic Monthly$17.991 Month
- Basic Monthly$20.001 Month
- Essential Monthly$37.991 Month
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- Essential Monthly$45.001 Month
- Pro Monthly$49.991 Month
- Pro Monthly$60.001 Month
- Basic Annually$149.991 Year
- Basic Annually$200.001 Year
- Pro Annually$419.991 Year
- Essential Annually$450.001 Year
