# UNDÅ vs Rewrite

The clearest difference is in-app purchases: UNDÅ at none against Rewrite's 6. UNDÅ also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Rewrite sells 6 in-app purchases, starting at $4.99 per 7 days. UNDÅ asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 22, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | UNDÅ | Rewrite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (379 ratings)](https://appshunter.io/ios/app/rewrite-sentence-corrector/id6448754772/reviews)** |
| Number of ratings | — | **379** |
| Positive reviews | — | 88.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 20 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sonder Mut, S.A. de C.V.](https://appshunter.io/developer/1548344457) | [Evgeniy Mikholap](https://appshunter.io/developer/1278455309) |

## What reviewers say

### UNDÅ

[App page](https://appshunter.io/ios/app/unda/id1548344455)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rewrite

[App page](https://appshunter.io/ios/app/rewrite-sentence-corrector/id6448754772)

Improve your writing with this AI-powered tool that corrects grammar, spelling, and suggests synonyms.  It offers contextual checks and explanations to help you write like a native speaker and enhance your English skills.

**Highlights:** Contextual grammar check, Spell check, Smart recommendations, Synonym suggestions, Definitions, Grammatical explanations, One-tap sharing

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rewrite: Grammar, Spell Check | $4.99 | per 7 days |
| Rewrite Pro: Monthly | $9.99 | per month |
| Rewrite Pro: Annual Special | $19.99 | per year |
| Rewrite Pro: Quarterly | $19.99 | per 3 months |
| Rewrite Pro: Annual | $29.99 | per year |
| Rewrite: Grammar, Spell Check | $39.99 | per year |

**What reviewers like**

- 👍 Excellent for grammar improvement
- 🚀 Fast and effective
- 👍 Improves writing skills tremendously
- 👍 Perfect for college
- 👍 Helps fix grammar and makes writing sound better

**What reviewers complain about**

- 😞 Disappointed with customer service
- 😞 Charged for unused app
- 🤔 Wish pricing was better
- 🤔 Desire for monthly/yearly subscription at lower rate

**Requested features**

- Available as an iOS keyboard app
- Add a Paste button for easier use


## Frequently asked questions

### Is UNDÅ free?

UNDÅ is free to download, with no in-app purchases.

### Is Rewrite free?

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

### Do UNDÅ or Rewrite have ads?

Rewrite shows ads; UNDÅ does not.

### Which is updated more often, UNDÅ or Rewrite?

UNDÅ ships an update every 3 weeks, and Rewrite every 3 weeks. Most recently, UNDÅ was updated on September 22, 2026 and Rewrite on October 13, 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.*