Comparison

Dyna vs Open Channel Flow Lite

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

Head to head
About

Dyna

Explore and search detailed specifications for motor power sections, rotors, and stators. Find the ideal drilling solution by filtering based on tool size, lobes, stages, and revolutions per gallon. Save favorites and connect with experts.

Highlights
  • Browse power section spec sheets
  • Search by tool size, lobes, stages, and RPM
  • Identify optimal drilling solutions
  • Save commonly used spec sheets
  • Connect with regional experts
Features
Read full description

Dyna-Drill offers a broad range of motor power sections, rotors, and stators that are designed and manufactured to withstand the most demanding drilling applications. The Dyna-Drill Power Sections app enables you to browse and search power section spec sheets to identify the best solution for your specific needs. You can search by tool size, number of lobes, stages, and revolutions per gallon to ensure you have the right technology for your application. The app also enables you to save your most commonly used spec sheets under the “Favorites" tab for easy access. In addition, by using the “Contact” button, you will be able to connect with a Dyna-Drill expert in your region.

About

Open Channel Flow Lite

Features
Read full description

Open Channel Flow Lite is the free edition of Open Channel Flow Pro. It has every feature of the Pro version, for small channels. CHANNEL SHAPES • Rectangular • Trapezoidal • Circular • Natural (irregular cross-section, with overbank roughness) • Triangular • Parabolic SOLVE FOR • Discharge, water depth, bed slope, and the channel width or pipe diameter, using Manning's equation RESULTS • Flow area, wetted perimeter, hydraulic radius, velocity, Froude number and flow regime • Critical depth, specific energy, alternate and sequent depths • Discharge rating curve and specific energy charts MORE TOOLS • Water surface profiles by the direct step method, from a control depth • Efficient Section: size the best section for a design discharge • Manning's n picker • Metric and English units • Worksheets to save and reopen your calculations • PDF reports to share • Built-in documentation and usage manual • iPhone and iPad LIMITS OF THE LITE VERSION • Discharge up to 0.5 m³/s (17.65 ft³/s) • Water depth in a circular channel up to 0.6 m (1.96 ft) • Trapezoidal side slope of 1:1 only Open Channel Flow Pro removes these limits. No account and no ads. Your worksheets stay on your device.

Screenshots

Dyna4 screens
Open Channel Flow Lite4 screens

Verdict

The call

The clearest difference is iOS requirement: Dyna at 8.0 against Open Channel Flow Lite's 15.0. On price, update cadence, ads and 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Dyna ships an update every 19 months, Open Channel Flow Lite every 13 months. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

Scorecard1 real difference · 9 level
Dyna versus Open Channel Flow Lite: the parameters behind the verdict, then further details
ParameterDynaOpen Channel Flow Lite
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 19 monthsEvery 13 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.0
Further details — not scored
Size26 MB2 MB
Age rating4+4+
DeveloperSchlumberger Technology CorporationAlexius Academia

In-app purchases

None

Dyna

No in-app purchases

None

Open Channel Flow Lite

No in-app purchases

Questions

Is Dyna free?
Dyna is free to download, with no in-app purchases.
Is Open Channel Flow Lite free?
Open Channel Flow Lite is free to download, with no in-app purchases.
Do Dyna or Open Channel Flow Lite have ads?
Neither Dyna nor Open Channel Flow Lite shows ads.
Which is updated more often, Dyna or Open Channel Flow Lite?
Dyna ships an update every 19 months, and Open Channel Flow Lite every 13 months. Most recently, Dyna was updated on October 6, 2026 and Open Channel Flow Lite on October 14, 2026.

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