# Lines E vs OBE Engineering System

The clearest difference is update cadence: Lines E at every 6 weeks against OBE Engineering System's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Lines E ships an update every 6 weeks, OBE Engineering System every 9 months. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Lines E | OBE Engineering System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (6 ratings)](https://appshunter.io/ios/app/lines-e-learning/id1547006460/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | Free | — |
| Size | 37 MB | 37 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Mansour](https://appshunter.io/developer/901378607) | [Softzone](https://appshunter.io/developer/1576527087) |

## What reviewers say

### Lines E

[App page](https://appshunter.io/ios/app/lines-e-learning/id1547006460)

Access a diverse library of educational tutorials led by expert instructors. Choose from various subjects, grade levels, and fields to enhance your learning journey.

**Highlights:** Connect with expert teachers, Wide range of tutorials, Choose by material, Select by grade, Browse by field

**In-app purchases:** none


### OBE Engineering System

[App page](https://appshunter.io/ios/app/obe-engineering-system/id1668638241)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lines E free?

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

### Is OBE Engineering System free?

OBE Engineering System is free to download, with no in-app purchases.

### Do Lines E or OBE Engineering System have ads?

Neither Lines E nor OBE Engineering System shows ads.

### Which is updated more often, Lines E or OBE Engineering System?

Lines E ships an update every 6 weeks, and OBE Engineering System every 9 months. Most recently, Lines E was updated on September 17, 2026 and OBE Engineering System on September 21, 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.*