# OffOf vs Acute Calculator

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.

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.

## The numbers

| Metric | OffOf | Acute Calculator |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.6 (11 ratings)](https://appshunter.io/ios/app/offof/id883081837/reviews) | **[4.9 (117 ratings)](https://appshunter.io/ios/app/acute-calculator/id6476837563/reviews)** |
| Number of ratings | 11 | **117** |
| Positive reviews | 60.7% of reviews | **94.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 59 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 16 MB |
| Requires iOS | 17.2 | **16.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Daeo Corp. Software](https://appshunter.io/developer/440991527) | [Find App, Inc.](https://appshunter.io/developer/1666757711) |

## What reviewers say

### OffOf

[App page](https://appshunter.io/ios/app/offof/id883081837)

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.

**Highlights:** Calculate percentage OFF, Calculate percentage OF, Shopping discount calculations, Mechanical keyboard sounds, Haptic feedback

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- ✨ Gorgeous design
- 👍 Simple and useful utility
- 💯 Best percentage calculator
- ✅ Does what it says
- 💡 Beautifully minimalist

**What reviewers complain about**

- ❌ Not updated
- ⚠️ Abandoned app
- 📉 No longer works
- 💔 Incompatible with iOS
- ⏳ Outdated

**Reported bugs**

- Not compatible with new iOS updates
- App no longer opens/works
- Freezes and force closes

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/acute-calculator/id6476837563)

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.

**Highlights:** Visual editor, 30+ functions supported, History tape, Store variables, Intuitive palette system

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acute Plus Limited-Time Offer | $3.49 | one-time |
| Acute Plus (For Students) | $4.99 | one-time |
| Acute Plus (One Time) | $6.99 | one-time |

**What reviewers like**

- ✨ Beautiful and artistic design
- 🚀 Advanced functionality beyond default
- 👍 Smooth animations and transitions
- 💡 Intuitive and user-friendly interface
- ✅ Replaces default calculator effectively

**What reviewers complain about**

- 🐛 Animation lag in history
- 🤔 Graph lacks numbers/functional purpose
- 💸 Calculus functions require payment
- ❓ Discount button crashes app
- 🐞 UI bugs and animations

**Reported bugs**

- 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

**Requested features**

- 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


## Frequently asked questions

### Is OffOf free?

OffOf costs $0.99, with no in-app purchases.

### Is Acute Calculator free?

Acute Calculator is free to download, with in-app purchases available.

### Which has better reviews, OffOf or Acute Calculator?

Acute Calculator is rated higher. OffOf averages 4.6 out of 5 from 11 ratings, while Acute Calculator averages 4.9 from 117 ratings.

### Do OffOf or Acute Calculator have ads?

Neither OffOf nor Acute Calculator shows ads.

### Which is updated more often, OffOf or Acute Calculator?

OffOf ships an update every 59 months, and Acute Calculator every 2 days. Most recently, OffOf was updated on November 6, 2026 and Acute Calculator on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*