Percentage vs Flow Rate Help
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Percentage
This utility calculates proportions between two values expressed as percentages. It allows you to find any unknown value in a percentage equation, including percent increases or decreases.
- Calculate any percentage value
- Find percent increase
- Find percent decrease
- Supports iPhone and iPad
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This percentage calculator helps to find the proportion between two values expressed in percent. You can calculate any value in the percentage equation, just fix the one you want to have calculated. You can choose to calculate the percent increase or decrease between two values as well.
Flow Rate Help
Calculate liquid flow rate, pipe diameter, or velocity with ease. Customize units for diameter, velocity, and flow rate, and set your preferred decimal places for precise results.
- Solve flow rate equations
- Customizable diameter units
- Customizable velocity units
- Customizable flow rate units
- Set decimal places
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Quickly find flow rate, required pipe diameter or velocity of a liquid! Features Include: - Accurately solve flow rate equations - Set preferred diameter unit from: mm, cm, m, km, inches, feet, yards and miles - Set preferred velocity unit from: m/s, m/min, km/min, km/h, ft/s, ft/min, mi/min and mph - Set preferred flow rate unit from: m³/s, m³/min, m³/h, l/s, l/min, l/h, gps. gpm and gph - Select your preferred number of decimal places
Screenshots
Verdict
The clearest difference is rating: Flow Rate Help at 4.3 against Percentage's 3.0. Flow Rate Help also leads on ratings volume (44 vs 2) and iOS requirement (11.0 vs 15.6). 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
Percentage costs $0.99 and Flow Rate Help $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Flow Rate Help holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Flow Rate Help has 44 ratings behind it against 2, so its average is the more settled of the two.
Percentage ships an update every 14 months, Flow Rate Help every 15 months. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.
| Parameter | Percentage | Flow Rate Help |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 3.0 (2 ratings) | 4.3 (44 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 2 | 44 — better |
| Update frequency | Every 14 months — better | Every 15 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Piet Jonas | Armchair Engineering |
Customer experience
Percentage
Flow Rate Help
In-app purchases
Percentage
No in-app purchases
Flow Rate Help
No in-app purchases
Questions
Is Percentage free?
Is Flow Rate Help free?
Which has better reviews, Percentage or Flow Rate Help?
Do Percentage or Flow Rate Help have ads?
Which is updated more often, Percentage or Flow Rate Help?
Other comparisons
