Comparison

Flow Test Calculator vs Joyfill

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

Head to head
About

Flow Test Calculator

Calculate hydrant flow rates and determine maximum water system flow. This tool uses a standard variation of the Hazen-Williams formula for calculations. Imperial units are currently supported, with metric coming soon.

Highlights
  • Hydrant flow rate calculation
  • Maximum water system flow determination
  • Hazen-Williams formula implementation
  • Imperial unit support
  • Future metric unit support
Features
Read full description

This app is a simple flow test calculator to assist the user with determining flow rates of hydrants as well as determining if the maximum flow of the water system. A standard variation of the Hazen-Williams formula is used to determine the Max Flow Available. All units are in Imperial. Metric to come soon.

About

Joyfill

Streamline workflows with digital forms for inspections and client management. Create custom templates or use pre-built ones, and manage tasks collaboratively. Work offline and sync data when reconnected.

Highlights
  • Offline data entry
  • Custom form builder
  • Client management
  • Inspection scheduling
  • Collaborative calendar
  • Pre-built templates
Features
Read full description

Joyfill offers powerful and easy to use digital forms to help you collaborate with your team, streamline internal processes, and eliminate manual document tasks and processes. Highlight Features: Offline entry Collect information using the offline mode, then upload and sync once reconnected. Custom Form Builder Create and customize digital forms to fit your inspections, or choose from a list of 100s if compliance approved templates, including: NFPA, proposals, invoices and more. Client management Effectively manage all your inspection clients in one place. View activity between your team and clients. Better organize the way your track and interact with your clients. Inspection schedules Teams can organize and schedule inspections, tasks or to-dos on an online collaborative calendar. Always know where you are in the inspection process. And much more!

Screenshots

Flow Test Calculator2 screens
Joyfill4 screens

Verdict

The call

The clearest difference is rating: Joyfill at 5.0 against Flow Test Calculator's 4.1. Joyfill also leads on in-app purchases (none vs 4) and update cadence (every 14 months vs every 90 months). Flow Test Calculator's advantage is ratings volume (63 vs 3). On price, ads, device support and iOS requirement 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. Flow Test Calculator sells 4 one-off in-app purchases. Joyfill asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Joyfill holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Flow Test Calculator has 63 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Flow Test Calculator ships an update every 90 months, Joyfill every 14 months. The most recent releases landed on September 18, 2026 and October 6, 2026 respectively.

Scorecard5 real differences · 5 level
Flow Test Calculator versus Joyfill: the parameters behind the verdict, then further details
ParameterFlow Test CalculatorJoyfill
PriceFreeFree
Rating4.1 (63 ratings)5.0 (3 ratings) — better
Positive reviews68.8% of reviews—
Number of ratings63 — better3
Update frequencyEvery 90 monthsEvery 14 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.013.4 — better
Further details — not scored
Size2 MB23 MB
Age rating4+4+
DeveloperLarry OwensBuilt To Create LLC

Customer experience

Flow Test Calculator

All ratings63 ratings
Positive79.4%
Neutral9.5%
Negative11.1%
Written reviews16 reviews
Positive68.8%
Neutral6.3%
Negative25.0%

Joyfill

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Flow Test Calculator

One-time4
  • Disable Purchase Requests$0.99
  • Disable Purchase Requests 1.99$1.99
  • Disable Purchase Request 4.99$4.99
Show 1 more
  • Disable Purchase Requests 9.99$9.99
None

Joyfill

No in-app purchases

Questions

Is Flow Test Calculator free?
Flow Test Calculator is free to download, with in-app purchases available.
Is Joyfill free?
Joyfill is free to download, with no in-app purchases.
Which has better reviews, Flow Test Calculator or Joyfill?
Joyfill is rated higher. Flow Test Calculator averages 4.1 out of 5 from 63 ratings, while Joyfill averages 5.0 from 3 ratings.
Do Flow Test Calculator or Joyfill have ads?
Neither Flow Test Calculator nor Joyfill shows ads.
Which is updated more often, Flow Test Calculator or Joyfill?
Flow Test Calculator ships an update every 90 months, and Joyfill every 14 months. Most recently, Flow Test Calculator was updated on September 18, 2026 and Joyfill on October 6, 2026.

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