Comparison

Plot Digitizer vs Directional Well Survey

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

Head to head
About

Plot Digitizer

Extract numerical data from 2D plot images. Easily obtain X and Y coordinates from scanned graphs or photos, allowing you to view, export, or share the digitized information.

Highlights
  • 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
Features
Read full description

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.

About

Directional Well Survey

Features
Read full description

This "Directional Well Survey" application provides an easy and useful tool for students and directional engineers to edit, calculate interpolations and plot survey stations of the horizontal and directional wells using the five calculation methods (tangential, balanced tangential, minimum curvature, radius of curvature, angle averaging). This application does not normally edit well planning. But it is still possible to edit only via CSV text. The well planning can be built and edited using our apps "Directional Well Planning" or "Directional Drilling" available in our portfolio. The data files (*.ddf) including well planning and survey stations are compatible and can be shared via iCloud. The well planning and survey stations can also be imported from CSV text files, for example: "MD","INC","AZI","TVD","N/S","E/W" "1000.0","0.0","0.0","1000.0","0.0","0.0" "1100.0","3.0","10.0" "1200.0","6.0","15.0" ... The values can be "quoted" or unquoted and separated by: - Comma: 1.00,2.00,3.00 - Semicolon: 1.00;2.00;3.00 or 1,00;2,00;3,00 - Tab: 1.00 2.00 3.00 (TSV file) - Space: 1.00 2.00 3.00 Please, before purchasing, make sure that this application will be useful for you. This application was developed based on existing spreadsheets. There is no comparison with any other software. Our goal was to create a very low cost application with the help of experts to share with drilling engineers, technicians, drillers, drilling engineering students and teachers. It is not intended to replace professional software. You can contribute with suggestions for improvements, correcting the English translation, reporting bugs and sharing it with your friends. Features: 1. Easy tool to edit survey stations (add, insert, edit, del) 2. Easy tool to import/export well planning and survey stations using CSV text format (well planning up to 20 sections) 3. 2D and 3D well plotting (vertical section and plan view) 4. Easy tool for interpolation calculations between two survey stations 5. Dynamic visualization of the interpolation parameters in the plot 6. Ability to work with data files (editing locally and sharing on iCloud) 7. Sharing data files with other applications in our portfolio (Directional Drilling, Directional Well Planning and Multilateral Directional Wells). DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.

Screenshots

Plot Digitizer4 screens
Directional Well Survey4 screens

Verdict

The call

The clearest difference is price: Plot Digitizer at $3.99 against Directional Well Survey's $14.99. Plot Digitizer also leads on update cadence (every 3 days vs every 18 months). Directional Well Survey's advantage is iOS requirement (11.0 vs 14.1). On ads, in-app purchases and device support 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

Plot Digitizer costs $3.99 and Directional Well Survey $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Plot Digitizer ships an update every 3 days, Directional Well Survey every 18 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

Scorecard3 real differences · 7 level
Plot Digitizer versus Directional Well Survey: the parameters behind the verdict, then further details
ParameterPlot DigitizerDirectional Well Survey
Price$3.99 — better$14.99
Rating2.3 (3 ratings) — better—
Positive reviews20.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 days — betterEvery 18 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.111.0 — better
Further details — not scored
Size44 MB10 MB
Age rating4+4+
DeveloperDaniel MedeirosCarlos Moura

In-app purchases

None

Plot Digitizer

No in-app purchases

None

Directional Well Survey

No in-app purchases

Questions

Is Plot Digitizer free?
Plot Digitizer costs $3.99, with no in-app purchases.
Is Directional Well Survey free?
Directional Well Survey costs $14.99, with no in-app purchases.
Do Plot Digitizer or Directional Well Survey have ads?
Neither Plot Digitizer nor Directional Well Survey shows ads.
Which is updated more often, Plot Digitizer or Directional Well Survey?
Plot Digitizer ships an update every 3 days, and Directional Well Survey every 18 months. Most recently, Plot Digitizer was updated on October 24, 2026 and Directional Well Survey on October 22, 2026.

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