OffOf vs Acute Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OffOf
This app simplifies percentage calculations for shopping discounts and finding a percentage of a number. It offers a clean interface with satisfying sound and haptic feedback for a delightful user experience.
- Calculate percentage OFF
- Calculate percentage OF
- Shopping discount calculations
- Mechanical keyboard sounds
- Haptic feedback
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A beautiful percentage calculator. OffOf helps you calculate to percentage OFF of a particular number, and the percentage OF a particular number. OffOf is NOT a full calculator. Your device already comes with a great calculator. OffOf is a Percentage Calculator ONLY. • 35% OFF Instantly know how much you're going to spend while shopping. What is the cost of that $18.99 t-shirt when its 35% off? OffOf makes it easy to calculate. Simply enter 35% as the "Percentage" and 18.99 as the "Amount" and OffOf will show you how much you'll be spending after the discount. • 16% OF What is 16% of 2,458? OffOf will get you that answer instantly. Just enter 16% as the "Percentage" and 2,458 as the "Amount" and you'll know right away. • Real, satisfying mechanical keyboard sounds • Delightful haptic feedback on button presses and more
Acute Calculator
This advanced graphing calculator offers a visual editor and supports over 30 functions. It includes features like a history tape, variable storage, and an intuitive palette system for complex calculations.
- Visual editor
- 30+ functions supported
- History tape
- Store variables
- Intuitive palette system
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+ Easy to use visual editor + Supports 30+ functions + Intuitive palette system + Comes with history tape + Store variables for later + No ads or subscriptions Terms of Use: https://acutecalc.app/terms Privacy Policy: https://acutecalc.app/privacy
Screenshots
Verdict
The clearest difference is price: Acute Calculator at Free against OffOf's $0.99. Acute Calculator also leads on review sentiment (95% vs 61%) and update cadence (every 2 days vs every 59 months). OffOf's advantage is in-app purchases (none vs 3) and device support (5 vs 2). On ads 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
Acute Calculator is free to download; OffOf costs $0.99 up front. Acute Calculator sells 3 one-off in-app purchases. OffOf asks for nothing beyond the download.
Acute Calculator holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Acute Calculator has 117 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 61% of OffOf's written reviews are positive against 95% of Acute Calculator's.
OffOf ships an update every 59 months, Acute Calculator every 2 days. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.
| Parameter | OffOf | Acute Calculator |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.6 (11 ratings) | 4.9 (117 ratings) — better |
| Positive reviews | 60.7% of reviews | 94.9% of reviews — better |
| Number of ratings | 11 | 117 — better |
| Update frequency | Every 59 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, Mac, Apple Watch, Vision Pro — better | iPhone, iPad |
| Requires iOS | 17.2 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Daeo Corp. Software | Find App, Inc. |
Customer experience
OffOf
Acute Calculator
User reviews
OffOf
From 11 App Store ratingsWhat we love
- ✨ Gorgeous design
- 👍 Simple and useful utility
- 💯 Best percentage calculator
- ✅ Does what it says
- 💡 Beautifully minimalist
Room to improve
- ❌ Not updated
- ⚠️ Abandoned app
- 📉 No longer works
- 💔 Incompatible with iOS
- ⏳ Outdated
Acute Calculator
From 117 App Store ratingsWhat we love
- ✨ Beautiful and artistic design
- 🚀 Advanced functionality beyond default
- 👍 Smooth animations and transitions
- 💡 Intuitive and user-friendly interface
- ✅ Replaces default calculator effectively
Room to improve
- 🐛 Animation lag in history
- 🤔 Graph lacks numbers/functional purpose
- 💸 Calculus functions require payment
- ❓ Discount button crashes app
- 🐞 UI bugs and animations
Bugs and requests
OffOf
Reported bugs
3 issues- Not compatible with new iOS updates
- App no longer opens/works
- Freezes and force closes
Requested features
5 requests- Make it a fully functional calculator
- Update to new software/iOS versions
- Show final price after discount
- Auto clear fields on tap
- Update for X screens
Acute Calculator
Reported bugs
6 issues- Animation and UI bugs
- Discount button crashes app
- Animation lags and skips when sliding down history
- Calculations are incorrect
- Does not follow correct order of operations
Show 1 moreShow fewer
- Transition for history is slow
Requested features
11 requests- Make app icon simpler/restrained
- Add units to graph
- Allow press and hold on graph lines for values
- Support Korean language
- Display commas while entering numbers
Show 6 moreShow fewer
- Double-tap to recenter graph interface
- Ability to solve for a variable
- Dedicated button for +/-
- Option to pin in control center
- Make comma separator format selectable
- Improve app icon design
In-app purchases
OffOf
No in-app purchases
Acute Calculator
- Acute Plus Limited-Time Offer$3.49
- Acute Plus (For Students)$4.99
- Acute Plus (One Time)$6.99
