# Basic Calculator+ vs 12Calendar

The clearest difference is rating: Basic Calculator+ at 4.9 against 12Calendar's 3.2. Basic Calculator+ also leads on in-app purchases (none vs 4) and review sentiment (87% vs 62%). 12Calendar's advantage is ads (none vs shown). On price, update cadence and monetization model there is nothing between them.

Both are free to download. 12Calendar sells 4 one-off in-app purchases. Basic Calculator+ asks for nothing beyond the download.

Basic Calculator+ holds the better App Store score, 4.9 against 3.2. That said, the two scores are not equally well evidenced: Basic Calculator+ has 260K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 87% of Basic Calculator+'s written reviews are positive against 62% of 12Calendar's.

Basic Calculator+ ships an update every 4 months, 12Calendar every 3 months. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Basic Calculator+ | 12Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (260K ratings)](https://appshunter.io/ios/app/basic-calculator-plus/id539356791/reviews)** | [3.2 (11 ratings)](https://appshunter.io/ios/app/12calendar/id598504307/reviews) |
| Number of ratings | **260K** | 11 |
| Positive reviews | **87.4% of reviews** | 61.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 50 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Best Free Apps](https://appshunter.io/developer/539356794) | [lagoon](https://appshunter.io/developer/455492858) |

## What reviewers say

### Basic Calculator+

[App page](https://appshunter.io/ios/app/basic-calculator-plus/id539356791)

Perform essential arithmetic operations with a straightforward calculator app. Its large buttons and clear display ensure ease of use, supporting both portrait and landscape orientations.

**Highlights:** Basic four functions, Clear display, Large buttons, Portrait and landscape modes, iPad compatible

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 👍 Large, clear buttons
- 👍 Straightforward, basic functionality
- 👍 No ads or in-app purchases
- 👍 Works well on iPad

**What reviewers complain about**

- 🐛 Inconsistent click volume
- 🐛 Ads can be intrusive or disruptive
- 🐛 Missing backspace/delete function

**Reported bugs**

- Incorrect calculation results
- Ads covering the screen

**Requested features**

- Add fraction button
- Implement order of operations
- Include memory function


### 12Calendar

[App page](https://appshunter.io/ios/app/12calendar/id598504307)

Customize your lock screen with a calendar. Choose from various layouts, fonts, and colors to display your schedule conveniently. Add custom holidays by importing from your device's calendar.

**Highlights:** Customizable calendar layouts, Selectable fonts and colors, Adjustable transparency and frame borders, Add custom holiday data, Import holidays from iOS calendar, Display year, month, and day of the week

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | Free | one-time |
| Hide Logo & SAVE available | $0.99 | one-time |
| Enable load calendar | $0.99 | one-time |
| Clear all functional limitation | $1.99 | one-time |


## Frequently asked questions

### Is Basic Calculator+ free?

Basic Calculator+ is free to download, with no in-app purchases.

### Is 12Calendar free?

12Calendar is free to download, with in-app purchases available.

### Which has better reviews, Basic Calculator+ or 12Calendar?

Basic Calculator+ is rated higher. Basic Calculator+ averages 4.9 out of 5 from 260K ratings, while 12Calendar averages 3.2 from 11 ratings.

### Do Basic Calculator+ or 12Calendar have ads?

Basic Calculator+ shows ads; 12Calendar does not.

### Which is updated more often, Basic Calculator+ or 12Calendar?

Basic Calculator+ ships an update every 4 months, and 12Calendar every 3 months. Most recently, Basic Calculator+ was updated on October 18, 2026 and 12Calendar on October 16, 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.*