# Sentence vs underlines.

The clearest difference is in-app purchases: underlines. at none against Sentence's 3. underlines. also leads on update cadence (daily vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sentence sells 3 in-app purchases, starting at $0.99 per month. underlines. asks for nothing beyond the download.

Sentence ships an update every 6 weeks, underlines. daily. Both last shipped on October 24, 2026.

## The numbers

| Metric | Sentence | underlines. |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Size | 109 MB | 174 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jong Seon Lee](https://appshunter.io/developer/1755967230) | [realnumber](https://appshunter.io/developer/1099841734) |

## What reviewers say

### Sentence

[App page](https://appshunter.io/ios/app/sentence-collect-quotes/id6749067440)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $9.99 | per year |
| Lifetime Subsription | $19.99 | one-time |


### underlines.

[App page](https://appshunter.io/ios/app/underlines/id6780154065)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sentence free?

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

### Is underlines. free?

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

### Do Sentence or underlines. have ads?

Neither Sentence nor underlines. shows ads.

### Which is updated more often, Sentence or underlines.?

Sentence ships an update every 6 weeks, and underlines. daily. Most recently, Sentence was updated on October 24, 2026 and underlines. 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.*