# Citaí vs Linear Regression Lab

The clearest difference is in-app purchases: Linear Regression Lab at none against Citaí's 8. Linear Regression Lab also leads on ads (none vs shown) and update cadence (every 3 days vs every 8 days). Citaí's advantage is iOS requirement (13.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. Citaí sells 8 in-app purchases, starting at $2.99 per month. Linear Regression Lab asks for nothing beyond the download.

Citaí ships an update every 8 days, Linear Regression Lab every 3 days. The most recent releases landed on October 22, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Citaí | Linear Regression Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/citai-citacoes-e-propostas/id6450833941/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 11 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Vinicius Carvalho](https://appshunter.io/developer/1695106594) | [Henrique Alvarenga da Silva](https://appshunter.io/developer/1875530482) |

## What reviewers say

### Citaí

[App page](https://appshunter.io/ios/app/citai-citacoes-e-propostas/id6450833941)

Enhance your writing with a vast library of quotes, ideas, and sociocultural knowledge. Get smart suggestions to improve your texts and unlock creativity with idea generators for academic success.

**Highlights:** Vast library of quotes, Sociocultural knowledge access, Intelligent text corrections, Idea generation for arguments, Academic writing enhancement

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Citaí Premium | $2.99 | per month |
| Citaí Premium - Trimestral | $6.99 | per 3 months |
| Citaí Premium - Semestral | $8.99 | per 6 months |
| Citaí Premium | $12.99 | per year |
| 100 Citacashs | $0.99 | one-time |
| 1000 Citacashs | $1.99 | one-time |
| 500 Citacashs | $1.99 | one-time |
| 1500 Citacashs | $2.99 | one-time |


### Linear Regression Lab

[App page](https://appshunter.io/ios/app/linear-regression-lab/id6763681036)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Citaí free?

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

### Is Linear Regression Lab free?

Linear Regression Lab is free to download, with no in-app purchases.

### Do Citaí or Linear Regression Lab have ads?

Citaí shows ads; Linear Regression Lab does not.

### Which is updated more often, Citaí or Linear Regression Lab?

Citaí ships an update every 8 days, and Linear Regression Lab every 3 days. Most recently, Citaí was updated on October 22, 2026 and Linear Regression Lab on October 14, 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.*