Flip Unit vs UnitFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flip Unit
Easily convert units across 12 categories including cooking, currency, and distance. Access conversions on your iPhone, Apple Watch, and home screen widgets. This app offers a clean interface and works offline for most conversions.
- 12 conversion categories
- Apple Watch app and complications
- iPhone home screen widgets
- Offline conversion (except currency)
- No ads or tracking
- iCloud sync
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Flip Unit: The unit converter built for everyone. Convert across 12 categories — cooking, distance, temperature, weight, area, volume, currency, pressure, power, speed, data, and fuel consumption — on your iPhone, Apple Watch, home screen, and lock screen. All for free. No ads, no tracking, no account required. NEW IN VERSION 2.0 • Apple Watch app — full converter on your wrist with haptic feedback • 12 Apple Watch complications — one-tap access to any category right from your watch face • 7 widgets for iPhone — quick-launch any category from your home screen, plus live currency rates on home and lock screens • iCloud sync — preferences and history across your iPhones and iPads, invisibly • 5 new categories: Pressure, Power, Speed, Data Storage, Fuel Consumption • Background rate refresh — currency widgets stay up to date without opening the app CONVERSIONS INCLUDED • Area — square feet, meters, acres, hectares • Cooking — cups, ml, tablespoons, grams, with ingredient-specific weights for flour, sugar, rice, butter, and more • Currency — 162+ currencies with live rates • Data / Storage — KB, MB, GB, TB (decimal and binary) • Distance — miles, km, feet, meters • Fuel Consumption — MPG (US & UK), L/100km, km/L • Power — watts, kilowatts, horsepower • Pressure — PSI, bar, atmospheres, pascal • Speed — mph, km/h, knots, m/s • Temperature — Fahrenheit, Celsius, Kelvin • Volume — litres, gallons, pints, fluid ounces (US & Imperial) • Weight — lbs, kg, ounces, grams WHY FLIP UNIT? • Lightning fast • Remembers your last-used units per category, on every device • Clean, simple interface • Works offline (except currency rates) • No account required • No ads or tracking Perfect for cooking, travel, business, home improvement, and everyday use. ACCESSIBILITY FIRST Flip Unit is designed for blind and low-vision users from the ground up. Full VoiceOver support, haptic feedback on iPhone and Apple Watch, Reduce Motion awareness, Dynamic Type, and WCAG AA contrast.
UnitFlow
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Convert miles to kilometers, pounds to kg, ounces to grams, and Fahrenheit to Celsius instantly. Perfect for switching between metric and imperial systems and for converting between multiples and submultiples of the same unit. Works completely offline. UnitFlow is ideal for travel, study, and working with international measurements or content from countries using different measurement systems. CONVERSIONS BETWEEN SYSTEMS - Miles ↔ Kilometers - Pounds ↔ Kilograms - Ounces ↔ Grams - Gallons ↔ Liters - Fahrenheit ↔ Celsius - Feet and inches ↔ Centimeters - Miles per hour ↔ km/h - Knots ↔ km/h CONVERSIONS WITHIN THE SAME UNIT Also supports conversions between multiples and submultiples: - Meters, centimeters, millimeters - Kilograms, grams, milligrams - Liters and milliliters - Hours, minutes, seconds FREE CATEGORIES (7) - Length - Weight - Volume - Area - Temperature - Speed - Time PREMIUM CATEGORIES With one-time purchase (no subscription), unlock 7 additional categories: - Pressure (bar, psi, pascal, atmospheres) - Energy (joules, calories, kilowatt-hours) - Voltage (volts, millivolts, kilovolts) - Current (amperes, milliamperes) - Power (watts, kilowatts, horsepower) - Digital Data (bytes, KB, MB, GB, TB) - Data Transfer Rate (bit/s, kbit/s, Mbit/s, Gbit/s) MULTILINGUAL SUPPORT UnitFlow is available in 6 languages: Italian, English, French, German, Spanish, and Japanese. From the developer of CurrencyFlow.
Screenshots
Verdict
The clearest difference is in-app purchases: Flip Unit at none against UnitFlow's 1. Flip Unit also leads on ads (none vs shown) and iOS requirement (17.6 vs 26.2). 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. UnitFlow sells 1 one-off in-app purchase. Flip Unit asks for nothing beyond the download.
| Parameter | Flip Unit | UnitFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Monthly | — |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 6 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | SIRAJ SALIM | Antonio Cetrangolo |
In-app purchases
Flip Unit
No in-app purchases
UnitFlow
- UnitFlow Premium$2.99









