# Plot Digitizer — Get data from 2D XY Plots

> Extracts numerical data from 2D plot images for scientific and research purposes. (iPhone/iPad app by Daniel Medeiros.)

- Source: https://appshunter.io/ios/app/plot-digitizer/id1497211648 (this page in markdown: same URL + `.md`)
- Developer: [Daniel Medeiros](https://appshunter.io/developer/1091004600)
- Category: Productivity, Education
- Price: $3.99
- Rating: 2.30/5 from 3 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.1 · 44 MB
- Released: 2020-01-31
- Data updated: 2026-08-12
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/plot-digitizer/id1497211648/reviews.md

## What is Plot Digitizer?

Plot Digitizer is an app to extract numerical data from plot images.

It is often necessary to obtain original (x, y) data from graphs, e.g. from scanned scientific plots, when data values are not available. Plot Digitizer allows you to easily get the numbers in such cases. 

Digitizing is a nine-step process:

1. Open a picture or take a photo of the plot;
2. Crop the picture to isolate the plot;
3. Align the plot, if required;
4. Do some fine-tuning cropping, if required;
5. Set the X and Y axes anchor points using your finger or an Apple Pencil;
6. Adjust the Axes Titles and anchor points;
7. Digitize the data series using your finger or an Apple Pencil;
8. Label the data series;
9. View, export the digitized data or view fitted equations.

At the end of the process, you can copy the data to the clipboard, share it with another app, view a digital plot or fitted equations from the digitized data.

Disclaimer:

The plot image shown in the screnshots is taken from: A. Danesh, D.-H. Xu, D.H. Tehrani, A.C. Todd. Improving predictions of equation of state by modifying its parameters for super critical components of hydrocarbon reservoir fluids. Fluid Phase Equilibria 112 (1995) 45-61.

## Key features

- Extract data from plot images
- Crop and align plots
- Set X and Y axes anchor points
- Digitize data series
- Label data series
- Export digitized data
- View fitted equations

## Chart rankings

- #189 in Top Paid · Productivity (US App Store)

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/plot-digitizer/id1497211648/reviews.md

### 4/5 — MacBook

*2025-08-03, version 1.4.1*

Nice because of regression methods embedded and App works on a MacBook M1 :-)

### 1/5 — Inconvenient

*2024-11-13*

It doesn’t cost that money

### 1/5 — doesn't work on a laptop

*2024-10-09*

should make it clear it doesn't work on a laptop

### 5/5 — Clever software that could be very useful for geology

*2022-08-02*

I’m still testing this software but I’m impressed with it already. Geology uses wellbore petrophysical logs that are often paper but need to be digital. This software can quickly convert strip charts on paper to digital data. With a few tweaks it could replace software that costs $10,000 per license and be easier to use. 

Nice job.

### 1/5 — Waste of money

*2022-06-30, version 1.4.1*

Not very user friendly, limited features, waste of money

### 1/5 — It often stops suddenly

*2022-04-20*

The app work so slow. It takes several minutes after clicking to a point or "next" button. When I choose the mode "take a picture", it quits immediately. When I choose the mode "select a picture", only pictures from my iphone are shown. How can I insert a picture from macbook? Want my money back!

### 1/5 — Не выполняет своих функций

*2021-03-14*

1) Нет поддержки формата дат. График с датами не получится автоматически распознать
2) Распознавания линии с изображения не происходит. Рисует точки там , где я провел пальцем, чтобы задать маску. Вот и вся магия.
3) С меня списалось 254 рубля вместо 175 как написано

### 1/5 — Waste of money!

*2021-02-07, version 1.3.0*

App does not work ...

### 3/5 — The nonlinear regression is not useful

*2020-03-08*

I hope you can correct this bug.

## Frequently asked questions about Plot Digitizer

### How does Plot Digitizer work?

Plot Digitizer guides you through a nine-step process to extract data. This includes opening or taking a picture of the plot, cropping, aligning, setting axes, digitizing data series, and then viewing or exporting the results.

### What devices is Plot Digitizer compatible with?

Plot Digitizer is available for iPhone, iPad, and iPod devices, supporting a wide range of iOS users.

### What is the age rating for Plot Digitizer?

Plot Digitizer has an age rating of 4+, making it suitable for a broad audience.

### How often is Plot Digitizer updated?

The latest version, 1.4.1, was released on June 26, 2022. Updates typically include improvements and new features for the app.

### Can I use Plot Digitizer with an Apple Pencil?

Yes, Plot Digitizer supports the use of an Apple Pencil for setting axes anchor points and digitizing data series, offering more precision.

### What can I do with the digitized data from Plot Digitizer?

Once digitized, you can copy the data to your clipboard, share it with other applications, view a digital plot of the extracted data, or see fitted equations.

### What is the price of Plot Digitizer?

Plot Digitizer is a paid application priced at $3.99.

### Does Plot Digitizer have ads?

No, Plot Digitizer does not contain advertisements, providing an uninterrupted user experience.

## Version history (last 5 releases)

### 1.4.1 — 2022-06-26

bug fixes

### 1.4.0 — 2021-11-13

- Better visualization of fitted curves
- Bug fixes

### 1.3.0 — 2020-11-04

Fixed processing of log graphs

### 1.2.0 — 2020-02-05

- Added High Precision Mode to axis anchor selection panel
- Added a calculation feature to fitted chart curves
- Minor adjustments and bug fixes

### 1.1.0 — 2020-02-04

- Added High Precision touch mode
- Fixed logarithmic data extraction

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## More apps by Daniel Medeiros

- [DWSIM Calculator Free](https://appshunter.io/ios/app/dwsim-calculator-free/id1091004601)
- [Natural Gas Props Calculator](https://appshunter.io/ios/app/natural-gas-props-calculator/id1099217044)
- [DWSIM Simulator](https://appshunter.io/ios/app/dwsim-simulator/id1162110266)
- [Chemyst](https://appshunter.io/ios/app/chemyst/id1477871260)
- [Falante](https://appshunter.io/ios/app/falante/id1491753530)

All apps by Daniel Medeiros: https://appshunter.io/developer/1091004600

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-12.*