70
BU Score
Strong
Rapid & Quick Calculator Pro
✍️ BU Analytics Review
“
Rapid & Quick Calculator Pro is an iOS app from KinkumaDesign in the Finance category, currently rated 4.9★ across 200 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Our BU Score puts it at 70 — Strong (healthy traction). For a Finance app, that means healthy traction.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 6 of 6 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($3.99)METRIC | +$2,800 | |
| Excellent rating (4.9★)METRIC | +$2,200 | |
| worth every pennyREVIEW | +$2,000 | |
| Mature app (10y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| Early-stage install base (200 ratings)METRIC | +$400 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Feb 25
May 25
Nov 25
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 7 MB🔞 4+📱 iOS 17.6+🔖 v6.7.0🔄 updated 1w ago🌐 EN, JA, KO, ZH📂 Finance💰 Paid🚀 Launched 2015 (10y old)
📝 About this app
Over 300,000 downloads worldwide!
A fast, friendly calculator built for everyday use — shopping, splitting bills, household budgeting, and more.
FEATURES
* History Tape — review your past calculations and reuse any answer with a single tap
* Expression Input — type the whole equation, just like you'd write it on paper
* Sales Tax — toggle tax-included/excluded with a single button; swipe to switch between multiple tax rates
* Percentage Discounts — e.g. 100 - 30% = 70
* Precise Rounding Settings
* Multiple Color Themes
* Multiple Font Sizes and Typefaces
* Arrow Keys — move the cursor left or right to edit any part of the expression
* Share — send expressions and answers to other apps
* iPad Support — including Slide Over and Split View on supported devices
* Sound Effects
To reuse or edit an equation from your history, swipe left on it (or touch and hold) to open the menu.
We'd love to hear your feedback!
A fast, friendly calculator built for everyday use — shopping, splitting bills, household budgeting, and more.
FEATURES
* History Tape — review your past calculations and reuse any answer with a single tap
* Expression Input — type the whole equation, just like you'd write it on paper
* Sales Tax — toggle tax-included/excluded with a single button; swipe to switch between multiple tax rates
* Percentage Discounts — e.g. 100 - 30% = 70
* Precise Rounding Settings
* Multiple Color Themes
* Multiple Font Sizes and Typefaces
* Arrow Keys — move the cursor left or right to edit any part of the expression
* Share — send expressions and answers to other apps
* iPad Support — including Slide Over and Split View on supported devices
* Sound Effects
To reuse or edit an equation from your history, swipe left on it (or touch and hold) to open the menu.
We'd love to hear your feedback!
🆕 What's New · v6.7.0
We've refreshed the wording across all languages for a more natural feel.
- Refined translations and wording in each language to feel more natural and easier to read
- Added support for iOS 26
- Now requires iOS 17.6 or later
- Improved overall stability
Thank you for your continued support!
- Refined translations and wording in each language to feel more natural and easier to read
- Added support for iOS 26
- Now requires iOS 17.6 or later
- Improved overall stability
Thank you for your continued support!
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Rapid & Quick Calculator Pro
- Developer
- KinkumaDesign
- Bundle ID
- com.kumade.app.zippycalc.pro
- App Store URL
- Open in App Store
- Category
- Finance
- Content rating
- 4+
- Languages
- EN, JA, KO, ZH
Company
- Website
- en.kuma-de.com
- Tagline
- KinkumaDesign
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $19.6K/mo
- Top-grossing rank
- Outside top 100 in US Finance
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- http://en.kuma-de.com/blog/
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- Not found
📈Ratings growth200 ratings+19900% lifetimeShow 3-year history estimate ▾
Tracked (35 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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