# Instant Cal — 15 Calculators Instant Results

> 15 Calculators Instant Results (iPhone/iPad app by Taek Oh.)

- Source: https://appshunter.io/ios/app/instant-cal/id6772655662 (this page in markdown: same URL + `.md`)
- Developer: [Taek Oh](https://appshunter.io/developer/1616205954)
- Category: Utilities, Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 49 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China)
- Released: 2026-05-25
- Data updated: 2026-09-06
- User reviews in markdown: https://appshunter.io/ios/app/instant-cal/id6772655662/reviews.md

## What is Instant Cal?

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.


## Version history (last 5 releases)

### 2.1.2 — 2026-09-02

Performance improvements and stability enhancements

### 2.1.1 — 2026-08-20

Performance improvements and stability enhancements

### 2.1.0 — 2026-08-07

Performance improvements and stability enhancements

### 2.0.8 — 2026-08-05

Performance improvements and stability enhancements

### 2.0.6 — 2026-07-18

• Improved ad delivery and measurement for more stable service.
• Supports privacy consent management (GDPR).
• Enhanced app startup speed and overall stability.
• Fixed various minor bugs.

## More apps by Taek Oh

- [Japan Lottery Results](https://appshunter.io/ios/app/japan-lottery-results/id1618492135)
- [Lotto USA](https://appshunter.io/ios/app/lotto-usa/id1629176368)
- [Korea Lottery](https://appshunter.io/ios/app/korea-lottery/id1629290411)
- [True Scanner](https://appshunter.io/ios/app/true-scanner/id1644020867)
- [12星座占い](https://appshunter.io/ios/app/12/id6444586599)
- [LED Board](https://appshunter.io/ios/app/led-board/id6477820669)

All apps by Taek Oh: https://appshunter.io/developer/1616205954

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*