ManyZero: Calc & Converter
Dongeun Jeong Travel iPhoneiPadiPod touch
ManyZero: Calc & Converter is a free Travel app for iPhone and iPad by Dongeun Jeong. Requires iOS 14.0. Updated November 30, 2025.
- Price
- Free
- on the App Store
- Size
- 43 MB
- Age 4+
- Updated
- Nov 30
- 2025 · v0.3.5
Screenshots
About ManyZero: Calc & Converter
NO MORE COMPLEX CALCULATIONS AND CONFUSING EXCHANGE RATES! ManyZero allows you to directly enter large figures (Millions, Billions) and switch freely between global units (K/M/B). Prevent calculation errors caused by too many zeros, and check precise exchange rates and crypto prices in real-time. ■ MAXIMUM PRODUCTIVITY FOR GLOBAL FINANCE (7 CORE FEATURES) 1. Number Reading – Error Prevention 3,000 → 3K, 10,000,000 → 10M: Instantly convert complex numbers to simplified units to avoid visual errors and enable quick decision-making. 2. Big Number Calculation Perform precise calculations with Millions and Billions. (Ideal for construction, government budgets, securities trading) 3. Big Amount Currency Conversion (Real-time Exchange) Real-time exchange rates for over 300 currencies, especially high-zero currencies (VND, IDR, JPY), ensuring accurate calculations. 4. Calculate & Convert in One (Calc & Convert) Efficiently execute complex international transactions by calculating and applying the exchange rate simultaneously. (Includes Business Calculation) 5. View Together – Dual Screen Use the Dual Screen mode during negotiations or travel to transparently check conversion results with the counterparty and build trust. 6. View at a Glance (Quick Understanding) The result of calculation and currency conversion is displayed rounded, allowing for a quick understanding of complex large numbers. 7. Unit Conversion – Global Compatibility Supports switching and conversion between global units (K/M/B) and national/local units for perfect compatibility in any business environment. ■ WHO NEEDS MANYZERO 1. Financial Professionals and High-Value Transactions Finance/Tax: Officials handling public budgets, bankers, securities traders, experts in planning/finance/accounting/tax M&A/Real Estate: Real estate investors, appraisers, construction, corporate valuation 2. Investors & Global Traders Investment: Stocks, bonds, cryptocurrencies, asset management Global Trade: Import/export, traders using Asian currencies 3. Business Travel & Tourism Individuals who frequently need to calculate high travel expenses or international remittances. 4. Education and Expatriates Students or expatriates who regularly deal with international currency units. [ ManyZero – THE NEW STANDARD FOR BIG NUMBER CALCULATION ] Stop wasting time typing too many zeros. Increase your efficiency and accuracy with ManyZero!
What’s new
Version 0.3.5 · Updated November 30, 2025
Added tutorial display on first launch or after 30 days of inactivity, based on the user's device language/region settings.
App privacy
The developer, Dongeun Jeong, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Contact Info: Email Address
Used for: App Functionality
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| ManyZero: Calc & Converter | – | Free | November 30, 2025 | |
| Simple Currency Exchange | – | Free | Jun 9, 2026 | Compare |
| Rate Note - Real-time, Offline | – | Free | Dec 29, 2024 | Compare |
| TabiLog / 旅ログ - GPSで記録できる旅行アプリ | – | Free | May 9, 2026 | Compare |
| 베트남 환율 계산기 | – | Free | Sep 14, 2026 | Compare |
| 베트남 환율계산기 -실시간환율, 계산기 기능 | – | Free | Aug 15, 2025 | Compare |
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