Flow Rate Conversion vs Unit Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flow Rate Conversion
Easily convert between various units of flow rate, including volume-based, mass-based, and mole-based measurements. Essential for physics and engineering applications involving fluid dynamics and hydrometry.
- Volume flow rate conversion
- Mass flow rate conversion
- Mole-based flow rate conversion
- Physics and engineering utility
- Fluid dynamics calculations
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Flow Rate Conversion - Easily convert between various units of flow rate, whether it's volume-based, mass-based, or mole-based. In the realms of physics and engineering, especially in the domains of fluid dynamics and hydrometry, volumetric flow rate (also referred to as volume flow rate, fluid flow rate, or volume velocity) signifies the volume of fluid that traverses a given point per unit of time. It's typically denoted by the symbol Q, with the SI unit being m³/s (cubic meters per second). Another unit occasionally used is sccm (standard cubic centimeters per minute). In physics and engineering, mass flow rate represents the mass of a substance passing through a point per unit of time. It's measured in kilograms per second in SI units and in slug per second or pound per second in US customary units. The common symbol is ṁ (pronounced "m-dot"), although sometimes μ (Greek lowercase mu) is employed. Occasionally, mass flow rate is referred to as mass flux or mass current, as seen, for instance, in Fluid Mechanics, Schaum's, and other references. In this article, we adopt the more intuitive definition. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Unit Converter
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A simple and easy-to-use unit converter app. Quickly and accurately convert commonly used units such as length, weight, temperature, area, volume, and speed. Just enter a number and it will automatically convert to the selected unit in real time. With a clean UI and history feature, anyone can use it intuitively. ● Key Features [Instant Unit Conversion] - Automatically converts as you type - Supports length / weight / temperature / area / volume / speed - Quickly select commonly used units - Real-time results [Supported Units] - Length: centimeter / meter / inch / foot, etc. - Weight: gram / kilogram / ounce / pound, etc. - Temperature: Celsius (℃) / Fahrenheit (℉) - Area: square meter / square foot / square mile / are, etc. - Volume: liter / milliliter / gallon, etc. - Speed: km/h / mph, etc. [Simple and Clean UI] - Minimal design focused on essential information - Large, easy-to-read text - Intuitive one-tap unit switching [Flexible History Management] - View conversion history in a list - Supports automatic or manual saving - Easily copy or delete history items [Quick Copy Feature] - Copy conversion results with a single tap [Customizable Settings] - Adjust decimal precision - Enable/disable haptic feedback - Choose how history is recorded [No Login Required] - No account needed — start using immediately From everyday calculations to work and study, enjoy a simple and stress-free unit conversion experience.
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Verdict
The clearest difference is price: Unit Converter at Free against Flow Rate Conversion's $2.99. Unit Converter also leads on update cadence (every 2 months vs every 29 months). Flow Rate Conversion's advantage is ads (none vs shown) and iOS requirement (13 vs 17.6). On 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
Unit Converter is free to download; Flow Rate Conversion costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Flow Rate Conversion ships an update every 29 months, Unit Converter every 2 months. The most recent releases landed on September 13, 2026 and August 23, 2026 respectively.
| Parameter | Flow Rate Conversion | Unit Converter |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 29 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13 — better | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Nitrio | MITSUKO MARGOT KUBOTA ONO |
In-app purchases
Flow Rate Conversion
No in-app purchases
Unit Converter
No in-app purchases





