Flow Test Calculator vs Joyfill
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Hydrant flow rate calculation
- Maximum water system flow determination
- Hazen-Williams formula implementation
- Imperial unit support
- Future metric unit support
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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.
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.
- Offline data entry
- Custom form builder
- Client management
- Inspection scheduling
- Collaborative calendar
- Pre-built templates
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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
Verdict
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
Both are free to download. Flow Test Calculator sells 4 one-off in-app purchases. Joyfill asks for nothing beyond the download.
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.
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.
| Parameter | Flow Test Calculator | Joyfill |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (63 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 68.8% of reviews | — |
| Number of ratings | 63 — better | 3 |
| Update frequency | Every 90 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 2 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Larry Owens | Built To Create LLC |
Customer experience
Flow Test Calculator
Joyfill
In-app purchases
Flow Test Calculator
- Disable Purchase Requests$0.99
- Disable Purchase Requests 1.99$1.99
- Disable Purchase Request 4.99$4.99
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- Disable Purchase Requests 9.99$9.99
Joyfill
No in-app purchases
Questions
Is Flow Test Calculator free?
Is Joyfill free?
Which has better reviews, Flow Test Calculator or Joyfill?
Do Flow Test Calculator or Joyfill have ads?
Which is updated more often, Flow Test Calculator or Joyfill?
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