Comparison

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.

Head to head
About

Flutter Firebase Festival

Features
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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.

About

Engineer's Unit Converter

Features
Read full description

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

Flutter Firebase Festival4 screens
Engineer's Unit Converter4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 2 level
Flutter Firebase Festival versus Engineer's Unit Converter: the parameters behind the verdict, then further details
ParameterFlutter Firebase FestivalEngineer's Unit Converter
PriceFreeFree
Update frequencyDaily — betterMonthly
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS11.0 — better18.0
Further details — not scored
Size107 MB7 MB
Age rating4+4+
DeveloperInvertase LimitedJose Gerardo Palma Duran

In-app purchases

None

Flutter Firebase Festival

No in-app purchases

1 purchases

Engineer's Unit Converter

One-time1
  • Remove Ads$0.99

Questions

Is Flutter Firebase Festival free?
Flutter Firebase Festival is free to download, with no in-app purchases.
Is Engineer's Unit Converter free?
Engineer's Unit Converter is free to download, with in-app purchases available.
Do Flutter Firebase Festival or Engineer's Unit Converter have ads?
Engineer's Unit Converter shows ads; Flutter Firebase Festival does not.
Which is updated more often, Flutter Firebase Festival or Engineer's Unit Converter?
Flutter Firebase Festival ships an update daily, and Engineer's Unit Converter monthly. Most recently, Flutter Firebase Festival was updated on October 25, 2026 and Engineer's Unit Converter on October 31, 2026.

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