# Acute Calculator vs SpecScan VIN Decoder

The clearest difference is monetization model: SpecScan VIN Decoder at free against Acute Calculator's free with in-app purchases. Acute Calculator's advantage is ratings volume (117 vs 1) and update cadence (every 2 days vs every 8 days). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Acute Calculator sells 3 one-off in-app purchases and SpecScan VIN Decoder sells 3 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Acute Calculator against 5.0 for SpecScan VIN Decoder. That said, the two scores are not equally well evidenced: Acute Calculator has 117 ratings behind it against 1, so its average is the more settled of the two.

Acute Calculator ships an update every 2 days, SpecScan VIN Decoder every 8 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Acute Calculator | SpecScan VIN Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (117 ratings)](https://appshunter.io/ios/app/acute-calculator/id6476837563/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/specscan-vin-decoder/id6800496761/reviews)** |
| Number of ratings | **117** | 1 |
| Positive reviews | 94.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 8 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 16 MB | 44 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Find App, Inc.](https://appshunter.io/developer/1666757711) | [SpecScan LLC](https://appshunter.io/developer/6800497213) |

## What reviewers say

### 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


### SpecScan VIN Decoder

[App page](https://appshunter.io/ios/app/specscan-vin-decoder/id6800496761)

Instantly determine a car's real market value using its VIN. Decode year, make, model, and factory options, then compare against live dealer listings. Ideal for buyers, sellers, enthusiasts, and dealers.

**Highlights:** Real market value with confidence rating, Comparable listings with prices and links, Deal analysis and offer price suggestions, Factory options decoded from VIN, Buyer guidance and negotiation tips, VIN scanning via door-jamb barcode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpecScan Starter | $19.99 | per month |
| SpecScan Pro | $49.99 | per month |
| SpecScan Ultimate | $99.99 | per month |


## Frequently asked questions

### Is Acute Calculator free?

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

### Is SpecScan VIN Decoder free?

SpecScan VIN Decoder is free to download, with in-app purchases available.

### Which has better reviews, Acute Calculator or SpecScan VIN Decoder?

SpecScan VIN Decoder is rated higher. Acute Calculator averages 4.9 out of 5 from 117 ratings, while SpecScan VIN Decoder averages 5.0 from 1 ratings.

### Do Acute Calculator or SpecScan VIN Decoder have ads?

Neither Acute Calculator nor SpecScan VIN Decoder shows ads.

### Which is updated more often, Acute Calculator or SpecScan VIN Decoder?

Acute Calculator ships an update every 2 days, and SpecScan VIN Decoder every 8 days. Most recently, Acute Calculator was updated on October 24, 2026 and SpecScan VIN Decoder on October 24, 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.*