Comparison

3D Interpolation vs Kotha

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

Head to head
About

3D Interpolation

Calculate key directional drilling parameters like TVD, coordinates, and displacement. This tool aids drilling engineers and students in oil well directional drilling by interpolating survey data.

Highlights
  • Calculate TVD, N/S, E/W coordinates
  • Determine Horizontal Displacement
  • Calculate Dog-Leg Severity
  • Measure Build-Up Rate
  • Calculate Turn Rate
  • Interpolate parameters between survey stations
Features
Read full description

The 3D Interpolation provides an useful tool to calculate projections TVD (True Vertical Depth), N/S and E/W coordinates, Horizontal Displacement, Dog-Leg Severity, Build-Up Rate (Angle Rate, Intensity) and Turn Rate and also the Interpolation of these parameters between two well planning sections or survey stations defined by Measured Depth, Inclination and Azimuth as entry parameters in the directional drilling of oil wells. Calculations Method: Minimum Curvature Length Units: Foot and Meter (Metre) Intensity Units: degree/100ft, degree/10m, degree/30m and degree/100m Our goal was to create a low-cost application with the help of experts to share with drilling engineers, technicians, drillers, students and teachers of drilling engineering. You can contribute with suggestions for improvements, correcting the translation to english, reporting bugs and sharing it with your friends. Thanks 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.

About

Kotha

Connect with friends and family using instant messaging, audio/video calls, and group chats. Share various file types and express yourself with stickers. Discover local services, news, and entertainment within the app.

Highlights
  • Instant messaging
  • Audio/video calls
  • Group chatting
  • File sharing
  • Bengali transliteration
  • Discover section with mini apps
  • News and entertainment
Features
Read full description

Kotha is a Social Communication & Lifestyle app developed in Bangladesh for Bangladeshi people and Bangla speaking community around the world. The purpose of the app is to offer Bangladeshis their own social media & communication tools, promote use of Bangla language and at the same time offer daily life useful local services, lifestyle contents, latest news and entertainment etc. Kotha enables users to communicate with instant messaging, audio/video calls, group chatting and users can share images, camera photos & videos, contacts, attachments and document files, cloud files, links, voice message, location, stickers etc. It’s easy to type and post in Kotha with Bengali transliteration. Kotha has a feed/timeline were users can post, rate, comment and share. The discover section of the app has mini apps integrated into Kotha as well as sports updates, news & events, market place etc. Gradually more third-party services will be integrated into Kotha.

Screenshots

3D Interpolation4 screens
Kotha4 screens

Verdict

The call

The clearest difference is review sentiment: Kotha at 58% against 3D Interpolation's 0%. Kotha also leads on price (Free vs $9.99) and update cadence (monthly vs every 37 months). 3D Interpolation's advantage is ads (none vs shown) and device support (3 vs 1). On in-app purchases 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

Kotha is free to download; 3D Interpolation costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

3D Interpolation ships an update every 37 months, Kotha monthly. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

Scorecard7 real differences · 3 level
3D Interpolation versus Kotha: the parameters behind the verdict, then further details
Parameter3D InterpolationKotha
Price$9.99Free — better
Rating—4.0 (5 ratings) — better
Positive reviews0.0% of reviews57.7% of reviews — better
Number of ratings—5 — better
Update frequencyEvery 37 monthsMonthly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size7 MB252 MB
Age rating4+12+
DeveloperCarlos MouraKotha Apps & Technologies Ltd.

Customer experience

3D Interpolation

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Kotha

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews26 reviews
Positive57.7%
Neutral3.8%
Negative38.5%

In-app purchases

None

3D Interpolation

No in-app purchases

None

Kotha

No in-app purchases

Questions

Is 3D Interpolation free?
3D Interpolation costs $9.99, with no in-app purchases.
Is Kotha free?
Kotha is free to download, with no in-app purchases.
Do 3D Interpolation or Kotha have ads?
Kotha shows ads; 3D Interpolation does not.
Which is updated more often, 3D Interpolation or Kotha?
3D Interpolation ships an update every 37 months, and Kotha monthly. Most recently, 3D Interpolation was updated on October 2, 2026 and Kotha on October 7, 2026.

Other comparisons