Instant Cal vs Calculator .
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Instant Cal
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See results the moment you type. Instant Calc is an all-in-one calculator that shows results as you enter numbers — no Calculate button needed. Just type and see. 15 Specialized Calculators Finance & Daily Life • Discount Calculator — Instantly calculate sale prices and savings • Loan Calculator — Monthly payment, total interest, full amortization • Savings Calculator — Final balance and after-tax interest • Currency Converter — Real-time rates for 14 currencies Dining & Splitting • Tip Calculator — Split bills with custom tip percentages • Dutch Pay — Divide any bill evenly among any number of people Health • BMI Calculator — Body mass index with health grade (ft/lb or cm/kg) • Age Calculator — Exact age in years, months, days + birthday countdown Unit Conversion • Length, Weight & Temperature converter (imperial ↔ metric) • Fuel Efficiency — MPG and km/L • Unit Price Comparison — Find the better deal instantly • Date Calculator — Days between dates, D-day countdown • Math & Engineering — Expression evaluator, trig, fraction→decimal Key Features 4 Languages — Korean · English · Japanese · Chinese Dark Mode / Light Mode toggle Favorites — Pin your most-used calculators to the top History — Review any past calculation anytime Large Text Mode — Bigger display for comfortable reading Live Exchange Rates — Auto-updated via KEB Hana Bank No sign-up. No clutter. Open the app and start calculating.
Calculator .
This utility app combines standard and scientific calculations with unit and currency conversions. It features a clean interface, calculation history, and automatic rate updates for currencies. Easily switch between functions without leaving the app.
- Standard and scientific calculator
- Unit conversion (length, weight, area, volume, temperature)
- Currency conversion with automatic rate updates
- Calculation history
- Distraction-free dark interface
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【NeonCalculator】 is a four-in-one calculator that handles everyday math, scientific functions, unit conversion, and currency conversion in one place, so calculating and converting happen without switching apps. Standard & Scientific Move freely between a clean standard keypad and scientific functions such as trigonometry, logarithms, powers, and constants for both quick sums and more advanced work. Unit Conversion Convert length, weight, area, volume, and temperature with results that update as you type, and swap the source and target units with a single tap. Currency Conversion Work with major world currencies, refresh reference rates automatically when online, and get an instant converted amount as soon as you enter a value. Calculation History Every result is saved in order, and tapping any entry brings it back so you can continue without retyping. Clean, Focused Layout A dark, distraction-free interface keeps the numbers at the center of the screen for comfortable reading, even over long sessions. From a quick total to a detailed conversion, NeonCalculator keeps your numbers tidy and within reach. Download it today. Premium Account Pricing and Terms $9.99/week* $39.99/year* *Prices are shown in US dollars; the actual charge may be converted to your local currency based on your country or region. Payment will be charged to your iTunes account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period, and the cost of renewal will be shown. Subscriptions may be managed by the user. Auto-renewal may be turned off by going to the user's Account Settings after purchase. Cancellation of the current subscription is not allowed during an active subscription period. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://laiyuzone.xyz/jisuanqi/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Instant Cal at none against Calculator .'s 4. Instant Cal also leads on device support (3 vs 1). Calculator .'s advantage is ads (none vs shown). On price, update cadence 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. Calculator . sells 4 in-app purchases, starting at $4.99 per 7 days. Instant Cal asks for nothing beyond the download.
Instant Cal ships an update every 2 weeks, Calculator . fortnightly. Both last shipped on October 28, 2026.
| Parameter | Instant Cal | Calculator . |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.2 (9 ratings) — better |
| Number of ratings | — | 9 — better |
| Update frequency | Every 2 weeks — better | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 31 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Taek Oh | Hong Kong Global Cross-Border E-Commerce Co., Limited |
In-app purchases
Instant Cal
No in-app purchases
Calculator .
- Weekly Peak3 Days trial$4.997 Days
- Weekly Ring3 Days trial$9.997 Days
- Yearly Peak$39.991 Year
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- Yearly Ring$39.991 Year









