# JustFit vs ScreenLines

The clearest difference is review sentiment: ScreenLines at 100% against JustFit's 33%. ScreenLines also leads on rating (5.0 vs 1.0) and update cadence (monthly vs every 18 months). JustFit's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.0). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. ScreenLines sells 2 in-app purchases, starting at $2.99 per year. JustFit asks for nothing beyond the download.

ScreenLines holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: ScreenLines has 16 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of JustFit's written reviews are positive against 100% of ScreenLines's.

JustFit ships an update every 18 months, ScreenLines monthly. The most recent releases landed on July 11, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | JustFit | ScreenLines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/justfit/id696338622/reviews) | **[5.0 (16 ratings)](https://appshunter.io/ios/app/screenlines/id6739783494/reviews)** |
| Number of ratings | 1 | **16** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | Free | Free |
| Size | 4 MB | 7 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yongseok Kim](https://appshunter.io/developer/1419426179) | [Artem Bolotov](https://appshunter.io/developer/901756576) |

## What reviewers say

### JustFit

[App page](https://appshunter.io/ios/app/justfit/id696338622)

This app offers an enhanced experience for applying screen protectors, even if you haven't purchased their product. It guides users through the attachment process, aiming to improve convenience.

**Highlights:** Screen protector attachment experience, Guidance for application, Works with or without product purchase, Improved user convenience

**Features:** macOS Compatibility

**In-app purchases:** none


### ScreenLines

[App page](https://appshunter.io/ios/app/screenlines/id6739783494)

This utility app provides a visual guide to perfectly align screen protectors on your device. It displays a white guideline around the screen edges, helping you position the protector with precision for a flawless installation.

**Highlights:** On-screen alignment guideline, Edge-to-edge white border, Step-by-step installation instructions, Tutorial video, Preparation tips, Keeps screen awake

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Yearly | $2.99 | per year |
| Premium Forever | $6.99 | one-time |


## Frequently asked questions

### Is JustFit free?

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

### Is ScreenLines free?

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

### Which has better reviews, JustFit or ScreenLines?

ScreenLines is rated higher. JustFit averages 1.0 out of 5 from 1 ratings, while ScreenLines averages 5.0 from 16 ratings.

### Do JustFit or ScreenLines have ads?

Neither JustFit nor ScreenLines shows ads.

### Which is updated more often, JustFit or ScreenLines?

JustFit ships an update every 18 months, and ScreenLines monthly. Most recently, JustFit was updated on July 11, 2026 and ScreenLines on September 18, 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.*