Comparison

HRoi 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

HRoi

Support your back office

Free

📊 Productivity

No ratingsView app →

Open Channel Flow Lite

Open Channel Hydraulics

Free

📊 Productivity

No ratingsView app →

About

HRoi

This app streamlines HR processes for businesses, offering tools for employee management, payroll, and benefits administration. It aims to simplify back-office operations and improve overall HR efficiency.

Highlights

Employee management
Payroll processing
Benefits administration
HR reporting
Document management

Features

Read full description

HRoi is a comprehensive HR management solution ...

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

HRoi4 screens

Open Channel Flow Lite4 screens

Verdict

The call

The clearest difference is update cadence: HRoi at monthly against Open Channel Flow Lite's every 13 months. On price, 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

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

UpkeepUpdate frequency

HRoi ships an update monthly, Open Channel Flow Lite every 13 months. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

Scorecard1 real difference · 7 level

HRoi versus Open Channel Flow Lite: the parameters behind the verdict, then further details
Parameter	HRoi	Open Channel Flow Lite
Price	Free	Free
Positive reviews	100.0% of reviews	—
Update frequency	Monthly — better	Every 13 months
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	15.1	15.0 — better
Further details — not scored
Size	65 MB	2 MB
Age rating	17+	4+
Developer	WACONTRE ONE MEMBER LIMITED	Alexius Academia

In-app purchases

None

HRoi

No in-app purchases

None

Open Channel Flow Lite

No in-app purchases

Questions

Is HRoi free?

HRoi 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 HRoi or Open Channel Flow Lite have ads?

Neither HRoi nor Open Channel Flow Lite shows ads.

Which is updated more often, HRoi or Open Channel Flow Lite?

HRoi ships an update monthly, and Open Channel Flow Lite every 13 months. Most recently, HRoi was updated on October 16, 2026 and Open Channel Flow Lite on October 14, 2026.