# UseePlus vs GTP API Gravity Calculator2

The clearest difference is review sentiment: GTP API Gravity Calculator2 at 100% against UseePlus's 25%. GTP API Gravity Calculator2 also leads on rating (4.0 vs 2.4). UseePlus's advantage is price (Free vs $9.99) and ratings volume (303 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

UseePlus is free to download; GTP API Gravity Calculator2 costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GTP API Gravity Calculator2 holds the better App Store score, 4.0 against 2.4. That said, the two scores are not equally well evidenced: UseePlus has 303 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 25% of UseePlus's written reviews are positive against 100% of GTP API Gravity Calculator2's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 13, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | UseePlus | GTP API Gravity Calculator2 |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [2.4 (303 ratings)](https://appshunter.io/ios/app/useeplus/id6443842645/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006/reviews)** |
| Number of ratings | **303** | 1 |
| Positive reviews | 25.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 33 MB | 9 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [亮 连](https://appshunter.io/developer/1687605002) | [Gammon Technical Products](https://appshunter.io/developer/1163782116) |

## What reviewers say

### UseePlus

[App page](https://appshunter.io/ios/app/useeplus/id6443842645)

This application allows you to view your phone's photo album files directly on your mobile device. It connects via USB to your phone, providing easy access to your media library.

**Highlights:** Connects via USB, View photo album files, Control software for MFI devices, Access phone media library

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Works great on iPhone
- 👍 Simple and easy to use
- 🔍 Good camera quality
- 🎥 Able to take photos and videos

**What reviewers complain about**

- 🐛 Frequent disconnections
- 🔌 Compatibility issues with newer iPhones
- 🔍 Poor image quality at higher magnification
- 🔒 Requires full photo library access

**Reported bugs**

- App freezes or crashes frequently
- Device not detected even when connected
- Inconsistent performance after software updates

**Requested features**

- Ability to switch between front and side cameras
- Option to save photos/videos without full library access
- Improved focus and zoom controls


### GTP API Gravity Calculator2

[App page](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006)

This application calculates the corrected API gravity at 60°F for jet, gasoline, and diesel fuels. It also determines the total weight of the fuel. It's a digital replacement for physical slide calculators.

**Highlights:** Corrected API gravity calculation, Total fuel weight calculation, Supports jet, gasoline, and diesel fuels, Digital version of slide calculators, Developed in 2025

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

**In-app purchases:** none


## Frequently asked questions

### Is UseePlus free?

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

### Is GTP API Gravity Calculator2 free?

GTP API Gravity Calculator2 costs $9.99, with no in-app purchases.

### Which has better reviews, UseePlus or GTP API Gravity Calculator2?

GTP API Gravity Calculator2 is rated higher. UseePlus averages 2.4 out of 5 from 303 ratings, while GTP API Gravity Calculator2 averages 4.0 from 1 ratings.

### Do UseePlus or GTP API Gravity Calculator2 have ads?

Neither UseePlus nor GTP API Gravity Calculator2 shows ads.

### Which is updated more often, UseePlus or GTP API Gravity Calculator2?

UseePlus ships an update every 2 months, and GTP API Gravity Calculator2 every 2 months. Most recently, UseePlus was updated on October 13, 2026 and GTP API Gravity Calculator2 on September 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.*