# Calculator Plus #1 vs 12Calendar

The clearest difference is rating: Calculator Plus #1 at 4.8 against 12Calendar's 3.2. Calculator Plus #1 also leads on review sentiment (89% vs 62%) and ratings volume (5.1K vs 11). 12Calendar's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Calculator Plus #1 sells 7 in-app purchases, starting at $0.99 per month and 12Calendar sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Calculator Plus #1 holds the better App Store score, 4.8 against 3.2. That said, the two scores are not equally well evidenced: Calculator Plus #1 has 5.1K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 89% of Calculator Plus #1's written reviews are positive against 62% of 12Calendar's.

Calculator Plus #1 ships an update every 5 weeks, 12Calendar every 3 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Calculator Plus #1 | 12Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.1K ratings)](https://appshunter.io/ios/app/calculator-plus-1/id576156235/reviews)** | [3.2 (11 ratings)](https://appshunter.io/ios/app/12calendar/id598504307/reviews) |
| Number of ratings | **5.1K** | 11 |
| Positive reviews | **88.5% of reviews** | 61.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 157 MB | 3 MB |
| Requires iOS | **15** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DigitAlchemy LLC](https://appshunter.io/developer/376971628) | [lagoon](https://appshunter.io/developer/455492858) |

## What reviewers say

### Calculator Plus #1

[App page](https://appshunter.io/ios/app/calculator-plus-1/id576156235)

A straightforward calculator app designed for everyday math, school, budgeting, and shopping. It offers essential functions, a clear interface with large buttons, and a history log for reviewing past calculations. Advanced features include memory functions, percentage calculations, and multi-window support for efficient workflow.

**Highlights:** Basic arithmetic operations, Calculation history, Memory function, Percentage calculations, Large buttons and display, Customizable themes, Multi-window mode

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator with History | $0.99 | per month |
| Calculator with History | $1.49 | per month |
| Simple Calculator - No Ads | $6.29 | per year |
| Simple Calculator - No Ads | $8.99 | per year |
| Remove ads | $3.99 | one-time |
| Multiple Basic Calculations | $8.99 | one-time |
| Multiple Basic Calculations | $12.99 | one-time |

**What reviewers like**

- 🚀 Great calculator
- 👍 Easy to use
- 👍 Looks very nice
- 👍 Reliable and dependable
- 👍 Useful features like memory

**What reviewers complain about**

- 🐛 Ads disrupt calculations
- 🐛 Too many ads
- 🐛 Ads pop up in the middle of calculations

**Reported bugs**

- App crashes or doesn't open
- Ads still show up even after paying to remove them

**Requested features**

- Add brackets/parentheses for arithmetic operations
- Improve arithmetic operator priority
- Add more algebraic and trigonometric functions


### 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 Calculator Plus #1 free?

Calculator Plus #1 is free to download, with in-app purchases available.

### Is 12Calendar free?

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

### Which has better reviews, Calculator Plus #1 or 12Calendar?

Calculator Plus #1 is rated higher. Calculator Plus #1 averages 4.8 out of 5 from 5.1K ratings, while 12Calendar averages 3.2 from 11 ratings.

### Do Calculator Plus #1 or 12Calendar have ads?

Calculator Plus #1 shows ads; 12Calendar does not.

### Which is updated more often, Calculator Plus #1 or 12Calendar?

Calculator Plus #1 ships an update every 5 weeks, and 12Calendar every 3 months. Most recently, Calculator Plus #1 was updated on November 6, 2026 and 12Calendar on November 1, 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.*