# Computer Science Calculations vs Retenciones de IVA e ISLR

The clearest difference is ads: Retenciones de IVA e ISLR at none against Computer Science Calculations's shown. Retenciones de IVA e ISLR also leads on update cadence (every 8 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Computer Science Calculations sells 3 in-app purchases, starting at $0.99 per 3 months and Retenciones de IVA e ISLR sells 5 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Computer Science Calculations ships an update monthly, Retenciones de IVA e ISLR every 8 days. The most recent releases landed on November 4, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Computer Science Calculations | Retenciones de IVA e ISLR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/retenciones-de-iva-e-islr/id6790051295/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 26 MB | 88 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047) | [Francel Sanchez Garcia](https://appshunter.io/developer/1621957952) |

## What reviewers say

### Computer Science Calculations

[App page](https://appshunter.io/ios/app/computer-science-calculations/id1488787780)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Version (3 months) | $0.99 | per 3 months |
| PRO Version (1 year) | $2.49 | per year |
| PRO Version (Lifetime) | $11.99 | one-time |


### Retenciones de IVA e ISLR

[App page](https://appshunter.io/ios/app/retenciones-de-iva-e-islr/id6790051295)

This app scans invoices and instantly generates VAT and ISLR withholding receipts. It transforms your device into an intelligent processing tool that reads physical or digital invoices, automating the creation of documents for your internal accounting management.

**Highlights:** Intelligent invoice scanner, Automated withholding receipt generation, Automated purchase book, TXT and XML file export, Error reduction

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IVA BASICO | $1.99 | per month |
| PLAN IVA/ISLR | $3.99 | per month |
| Plan IVA/ISLR PLUS | $4.99 | per month |
| Plan IVA/ISLR ULTRA | $5.99 | per month |
| Pack de 20 escaneos | $0.99 | one-time |


## Frequently asked questions

### Is Computer Science Calculations free?

Computer Science Calculations is free to download, with in-app purchases available.

### Is Retenciones de IVA e ISLR free?

Retenciones de IVA e ISLR is free to download, with in-app purchases available.

### Do Computer Science Calculations or Retenciones de IVA e ISLR have ads?

Computer Science Calculations shows ads; Retenciones de IVA e ISLR does not.

### Which is updated more often, Computer Science Calculations or Retenciones de IVA e ISLR?

Computer Science Calculations ships an update monthly, and Retenciones de IVA e ISLR every 8 days. Most recently, Computer Science Calculations was updated on November 4, 2026 and Retenciones de IVA e ISLR on November 10, 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.*