Flutter Firebase Festival vs Engineer's Unit Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flutter Firebase Festival
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Join us in unifying the Flutter & Firebase communities in the heart of Europe. F3 is a two-day event with talks, workshops, and codelabs from the leading experts in the industry.
Engineer's Unit Converter
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A unit converter built for engineering work rather than for the kitchen. Thirty-two categories, from the everyday ones to the specialist tables you normally go looking for in a handbook: AWG wire gauge, tons of refrigeration, viscosity, water hardness, radiation dose, moment of inertia. EVERY CATEGORY, ALL FREE Length, Area, Pressure/Stress, Mass/Weight, Energy/Work, Power, Force, Torque, Volume, Temperature, Time, Speed, Angle, Data, Frequency, Fuel Economy, Density, Flow, Viscosity, Acceleration, Electric Current, Voltage, Resistance, Electric Charge, Magnetic Flux Density, HVAC Cooling, Water Hardness, Radiation Activity, Radiation Dose, Radiation Equivalent Dose, Moment of Inertia, Wire Gauge. No unlocks, no ad to watch first, no timer. Every category above is open the moment you install. ENGINEERING TOOLS An expression calculator that accepts arithmetic, fractions and scientific notation, so you can type 3/8 or 1.2e-3 straight into the field. An HVAC sizing helper that turns tons of refrigeration into BTU/h, kW and rule-of-thumb airflow. Reference tables for physical constants, thermocouple types and hardness scales. BUILT FOR THE JOB Works fully offline, so it does not care about signal on site. Reads decimal commas and points the way your region writes them. Pin the units you use, hide the ones you never touch, and reorder the rest. Add your own units with a conversion factor. Every conversion is kept in a searchable history you can tap to reuse. No account, no sign-in, no data leaves the device.
Screenshots
Verdict
The clearest difference is in-app purchases: Flutter Firebase Festival at none against Engineer's Unit Converter's 1. Flutter Firebase Festival also leads on ads (none vs shown) and update cadence (daily vs monthly). On price 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
Both are free to download. Engineer's Unit Converter sells 1 one-off in-app purchase. Flutter Firebase Festival asks for nothing beyond the download.
Flutter Firebase Festival ships an update daily, Engineer's Unit Converter monthly. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.
| Parameter | Flutter Firebase Festival | Engineer's Unit Converter |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily — better | Monthly |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 107 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Invertase Limited | Jose Gerardo Palma Duran |
In-app purchases
Flutter Firebase Festival
No in-app purchases
Engineer's Unit Converter
- Remove Ads$0.99
Questions
Is Flutter Firebase Festival free?
Is Engineer's Unit Converter free?
Do Flutter Firebase Festival or Engineer's Unit Converter have ads?
Which is updated more often, Flutter Firebase Festival or Engineer's Unit Converter?
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