# CORE Calculator App vs UseePlus

The clearest difference is review sentiment: CORE Calculator App at 100% against UseePlus's 25%. CORE Calculator App also leads on rating (5.0 vs 2.4). UseePlus's advantage is in-app purchases (none vs 3) and ratings volume (303 vs 11). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CORE Calculator App sells 3 in-app purchases, starting at $4.99 per month. UseePlus asks for nothing beyond the download.

CORE Calculator App holds the better App Store score, 5.0 against 2.4. That said, the two scores are not equally well evidenced: UseePlus has 303 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 100% of CORE Calculator App's written reviews are positive against 25% of UseePlus's.

CORE Calculator App ships an update every 3 months, UseePlus every 2 months. Both last shipped on October 17, 2026.

## The numbers

| Metric | CORE Calculator App | UseePlus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/core-calculator-app/id1447118499/reviews)** | [2.4 (303 ratings)](https://appshunter.io/ios/app/useeplus/id6443842645/reviews) |
| Number of ratings | 11 | **303** |
| Positive reviews | **100.0% of reviews** | 25.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 148 MB | 33 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [AsInt Inc.](https://appshunter.io/developer/1438397626) | [亮 连](https://appshunter.io/developer/1687605002) |

## What reviewers say

### CORE Calculator App

[App page](https://appshunter.io/ios/app/core-calculator-app/id1447118499)

This app provides inspectors in the oil and gas industry with essential calculations for asset integrity. It offers tools for determining Tmin, MAWP, corrosion rates, and remaining life based on industry standards.

**Highlights:** Tmin calculations, MAWP calculations, Corrosion rate calculations, Remaining life determination, Construction material information, Damage mechanism identification

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Materials Lookup | $4.99 | per month |
| Damage Mech Screener | $9.99 | per month |
| Materials Lookup | $5.99 | one-time |


### 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


## Frequently asked questions

### Is CORE Calculator App free?

CORE Calculator App is free to download, with in-app purchases available.

### Is UseePlus free?

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

### Which has better reviews, CORE Calculator App or UseePlus?

CORE Calculator App is rated higher. CORE Calculator App averages 5.0 out of 5 from 11 ratings, while UseePlus averages 2.4 from 303 ratings.

### Do CORE Calculator App or UseePlus have ads?

Neither CORE Calculator App nor UseePlus shows ads.

### Which is updated more often, CORE Calculator App or UseePlus?

CORE Calculator App ships an update every 3 months, and UseePlus every 2 months. Most recently, CORE Calculator App was updated on October 17, 2026 and UseePlus on October 17, 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.*