Flip Unit vs Unitto
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.
Unitto
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Unitto is a fast, fully offline unit converter built for anyone who needs a clean answer without digging through menus. Type a query like "5 km to mi" or "98.6 f to c" and get an instant result — or browse by category and pick units by hand. Runners convert km to mi and km/h to mph mid-run; cooks convert grams to cups; travelers convert kg to lbs and celsius to fahrenheit before a trip. Every conversion happens on your device — no network calls, no accounts, and no ads. Nothing about what you convert ever leaves your phone. Included from the start: – Natural-language quick convert: type "5 km to mi" and get the answer immediately – Six core categories: length, weight, temperature, speed, volume, and area – Favorites for the conversions you use every day – Recent history so you never lose a result Unitto Pro (one-time purchase, unlocks forever) adds: – Batch convert: paste a whole list and get every result at once – Seven extra categories: time, data storage, pressure, energy, power, angle, and fuel economy – Extra precision on every result – Unlimited favorites No subscription. No accounts. No ads. Just a fast, accurate converter that works the moment you open it — even with no signal. Terms of Use: https://obelisk.club/unitconverter/terms | Privacy Policy: https://obelisk.club/unitconverter/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Flip Unit at none against Unitto's 1. Flip Unit also leads on iOS requirement (17.6 vs 26.0). On price, update cadence, ads 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. Unitto sells 1 one-off in-app purchase. Flip Unit asks for nothing beyond the download.
Flip Unit ships an update monthly, Unitto every 5 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Flip Unit | Unitto |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Monthly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | SIRAJ SALIM | 永 张 |
In-app purchases
Flip Unit
No in-app purchases
Unitto
- Unitto Pro$4.99









