UnitFlow vs FoldMetry
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
FoldMetry
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Open your iPhone Duo. See the angle at a glance. FoldMetry puts the current hinge angle front and center. The number moves as your device opens and closes, with a clean display that stays out of your way. Have a position in mind? Set a target angle and feel a gentle tap when you reach it. Save more than one for the angles you use often. The app follows your device’s Light or Dark appearance, and measurements stay on your device. All measuring features are free. If FoldMetry earns a spot in your day, you can leave a one-time tip to support its independent development. Tips don’t unlock extra features. Hinge angle measurement is available only on iPhone Duo. Other iPhones and iPad can view device support information but cannot measure hinge angles.
Screenshots
Verdict
The clearest difference is ads: FoldMetry at none against UnitFlow's shown. On price, in-app purchases, device support and iOS requirement 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 and FoldMetry sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | UnitFlow | FoldMetry |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 6 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.2 — better | 27.1 |
| Further details — not scored | ||
| Size | 15 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Antonio Cetrangolo | 亚军 胡 |
In-app purchases
UnitFlow
- UnitFlow Premium$2.99
FoldMetry
- Optional Developer Support$0.99





