# Calculator + vs Baintech Lithium Battery App

The clearest difference is review sentiment: Calculator + at 85% against Baintech Lithium Battery App's 0%. Calculator + also leads on update cadence (every 4 days vs monthly). Baintech Lithium Battery App's advantage is in-app purchases (none vs 12) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Calculator + sells 12 in-app purchases, starting at $4.99 per month. Baintech Lithium Battery App asks for nothing beyond the download.

Calculator + ships an update every 4 days, Baintech Lithium Battery App monthly. The most recent releases landed on September 26, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Calculator + | Baintech Lithium Battery App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (10K ratings)](https://appshunter.io/ios/app/calculator-plus/id351815470/reviews)** | — |
| Number of ratings | **10K** | — |
| Positive reviews | **84.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 48 MB | 32 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [xNeat.com](https://appshunter.io/developer/327498295) | [SUNFRT PTY LTD](https://appshunter.io/developer/477912653) |

## What reviewers say

### Calculator +

[App page](https://appshunter.io/ios/app/calculator-plus/id351815470)

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

**Highlights:** Free basic and scientific calculator, Intuitive interface with equation and result display, Fraction and percent support, Advanced editing capabilities, Polynomial and linear equation solver, Graphing calculator, Unit conversion and geometric calculators

**Features:** Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scientific Calculator | $4.99 | per month |
| Calculator | $39.99 | per year |
| Linear Calculator | $2.99 | one-time |
| Factoring Calculator | $2.99 | one-time |
| Handwriting Calculator | $2.99 | one-time |
| Currency Converter | $2.99 | one-time |
| Themes Pack | $2.99 | one-time |
| Graphing Calculator | $3.99 | one-time |
| Fraction Calculator | $3.99 | one-time |
| Scientific Calculator | $4.99 | one-time |
| Calculator Plus | $4.99 | one-time |
| Calculator | $16.99 | one-time |

**What reviewers like**

- 👍 Great features and easy to use
- 👍 Efficient and quick
- 👍 Versatile, functional calculator
- 👍 Fantastic, easy to use app
- 👍 Awesome calculator app

**What reviewers complain about**

- 🐛 New updated layout is awful
- 🐛 App is now terrible
- 🔒 Paying customer screwed over by update
- 🔒 Now timed trial, no free w/ads version
- 🔒 Not honest

**Reported bugs**

- Fraction calculator has TWO subtraction buttons and NO division button
- Decimals seem to be changed to fraction with no apparent way of changing it back
- Functionality is dropped by forcing you to the main menu every time you open it
- Currency converter broken
- Login screen freezes

**Requested features**

- Add mod function
- Add commas
- Add 1/x function
- Support for Retina Display
- Add number 4 with two lines


### Baintech Lithium Battery App

[App page](https://appshunter.io/ios/app/baintech-lithium-battery-app/id6464237907)

Monitor and manage Bluetooth-enabled lithium batteries with real-time data on voltage, current, temperature, and capacity. This app offers seamless connectivity and a user-friendly interface for optimizing battery performance across various devices.

**Highlights:** Bluetooth connectivity for lithium batteries, Real-time monitoring of voltage, current, temperature, and capacity, User-friendly and intuitive interface, Supports specific Baintech lithium battery models, Optimizes battery-powered device performance

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculator + free?

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

### Is Baintech Lithium Battery App free?

Baintech Lithium Battery App is free to download, with no in-app purchases.

### Do Calculator + or Baintech Lithium Battery App have ads?

Calculator + shows ads; Baintech Lithium Battery App does not.

### Which is updated more often, Calculator + or Baintech Lithium Battery App?

Calculator + ships an update every 4 days, and Baintech Lithium Battery App monthly. Most recently, Calculator + was updated on September 26, 2026 and Baintech Lithium Battery App on June 3, 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.*