# GravLens3 vs MGoPark

The clearest difference is review sentiment: GravLens3 at 80% against MGoPark's 25%. GravLens3 also leads on rating (3.7 vs 3.1) and iOS requirement (6.1 vs 15.0). MGoPark's advantage is update cadence (monthly vs every 17 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

GravLens3 holds the better App Store score, 3.7 against 3.1. Both are backed by a comparable volume of ratings — 6 and 12 respectively. Written reviews point the same way: 80% of GravLens3's written reviews are positive against 25% of MGoPark's.

GravLens3 ships an update every 17 months, MGoPark monthly. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | GravLens3 | MGoPark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (6 ratings)](https://appshunter.io/ios/app/gravlens3/id318275930/reviews)** | [3.1 (12 ratings)](https://appshunter.io/ios/app/mgopark/id6505115983/reviews) |
| Number of ratings | 6 | **12** |
| Positive reviews | **80.0% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Monthly** |
| Monetization | Free | Free |
| Size | 4 MB | 245 MB |
| Requires iOS | **6.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eli Rykoff](https://appshunter.io/developer/318275933) | [The University of Michigan](https://appshunter.io/developer/380339599) |

## What reviewers say

### GravLens3

[App page](https://appshunter.io/ios/app/gravlens3/id318275930)

Simulate the effects of gravitational lensing on your iPhone or iPad. Adjust lens parameters and apply distortions to your photos or live camera feed. Share your creations or project them for educational purposes.

**Highlights:** Simulate Hubble Space Telescope images, Adjust lens size and ellipticity, Distort photos from library or camera, Live real-time lensing view, AirPlay and external monitor support, Save and share distorted images

**Features:** macOS Compatibility

**In-app purchases:** none


### MGoPark

[App page](https://appshunter.io/ios/app/mgopark/id6505115983)

Navigate parking at the University of Michigan with real-time availability updates, interactive maps, and proactive notifications for permit renewals and campus announcements. Find parking based on permit type, get directions, and access resources like EV charging and parking programs.

**Highlights:** Real-time parking availability, Interactive campus map, Proactive notification alerts, Turn-by-turn directions, Save favorite locations, Permit renewal reminders, Resource section for parking programs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GravLens3 free?

GravLens3 is free to download, with no in-app purchases.

### Is MGoPark free?

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

### Which has better reviews, GravLens3 or MGoPark?

GravLens3 is rated higher. GravLens3 averages 3.7 out of 5 from 6 ratings, while MGoPark averages 3.1 from 12 ratings.

### Do GravLens3 or MGoPark have ads?

Neither GravLens3 nor MGoPark shows ads.

### Which is updated more often, GravLens3 or MGoPark?

GravLens3 ships an update every 17 months, and MGoPark monthly. Most recently, GravLens3 was updated on October 23, 2026 and MGoPark on October 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.*