# PowerOne calculator vs Calculator +ㅤ

The clearest difference is monetization model: PowerOne calculator at free with in-app purchases against Calculator +ㅤ's subscription. PowerOne calculator also leads on ads (none vs shown). Calculator +ㅤ's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (4.6K vs 806). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. PowerOne calculator sells 2 in-app purchases, starting at $2.99 per month and Calculator +ㅤ sells 6 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for PowerOne calculator against 4.6 for Calculator +ㅤ. That said, the two scores are not equally well evidenced: Calculator +ㅤ has 4.6K ratings behind it against 806, so its average is the more settled of the two. Written reviews are what separate them: 50% of PowerOne calculator's written reviews are positive against 47% of Calculator +ㅤ's.

PowerOne calculator ships an update every 3 months, Calculator +ㅤ fortnightly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | PowerOne calculator | Calculator +ㅤ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (806 ratings)](https://appshunter.io/ios/app/powerone-calculator/id1141498515/reviews)** | [4.6 (4.6K ratings)](https://appshunter.io/ios/app/calculator-plus/id1597933199/reviews) |
| Number of ratings | 806 | **4.6K** |
| Positive reviews | **50.5% of reviews** | 46.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 6 MB | 55 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Crafty Weasel, LLC](https://appshunter.io/developer/1602588690) | [Rocket Apps GmbH](https://appshunter.io/developer/1566586717) |

## What reviewers say

### PowerOne calculator

[App page](https://appshunter.io/ios/app/powerone-calculator/id1141498515)

This app offers a powerful calculator with hundreds of pre-built templates for finance, engineering, and more. Users can also create custom calculations for specific needs, ensuring accuracy and speed for repetitive tasks. Access your calculations across devices, online or offline.

**Highlights:** Hundreds of pre-built calculation templates, Create custom calculation templates, Standard and RPN calculator modes, Cross-device syncing (iPhone, iPad, Mac, Web), Offline access, Template sharing for teams, Customizable themes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $2.99 | per month |
| Annual Premium Subscription | $19.99 | per year |

**What reviewers like**

- 🚀 Powerful and versatile calculator
- 👍 Extensive template library
- 🚀 Customizable keyboard and layout
- 👍 Helpful customer support
- 🚀 Syncing across devices

**What reviewers complain about**

- 🔒 Requires account login
- 👎 Subscription pricing model
- 👎 Cluttered and less user-friendly interface
- 👎 Removed features from previous versions
- 🐛 Bugs and glitches

**Reported bugs**

- Calculator not accessible after update
- Templates disappearing after update
- Incompatibility with iOS 16
- Calculation errors in certain templates

**Requested features**

- Landscape mode support
- Ability to reorganize templates
- Restore previous version's interface
- Retain access to purchased features


### Calculator +ㅤ

[App page](https://appshunter.io/ios/app/calculator-plus/id1597933199)

This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.

**Highlights:** Snap and Scribble Calculator, Basic Calculator, Scientific Calculator, Fraction Calculator, Currency Converter, Calculation History, Customizable Themes

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Apps PRO Weekly | $2.99 | per 7 days |
| Rocket Apps PRO Monthly | $4.99 | per month |
| Rocket Apps PRO Yearly | $9.99 | per year |
| Rocket Apps PRO Offer | $19.99 | per year |
| Rocket Apps PRO Yearly | $19.99 | per year |
| Rocket Apps PRO Yearly | $29.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate calculations
- 🎨 Excellent visuals
- 💡 Helpful for academic work

**What reviewers complain about**

- 💰 Subscription model too expensive
- 🔍 Decimal entry quirks
- 📺 Too many ads
- 🔒 Locked features behind paywall

**Reported bugs**

- Inaccurate square root calculations
- Compatibility issues on iPad
- Decimal point not recognized

**Requested features**

- Negative number support
- Improved fraction calculator
- Scientific calculator layout
- Option to disable history feature


## Frequently asked questions

### Is PowerOne calculator free?

PowerOne calculator is free to download, with in-app purchases available.

### Is Calculator +ㅤ free?

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

### Which has better reviews, PowerOne calculator or Calculator +ㅤ?

PowerOne calculator is rated higher. PowerOne calculator averages 4.6 out of 5 from 806 ratings, while Calculator +ㅤ averages 4.6 from 4.6K ratings.

### Do PowerOne calculator or Calculator +ㅤ have ads?

Calculator +ㅤ shows ads; PowerOne calculator does not.

### Which is updated more often, PowerOne calculator or Calculator +ㅤ?

PowerOne calculator ships an update every 3 months, and Calculator +ㅤ fortnightly. Most recently, PowerOne calculator was updated on October 26, 2026 and Calculator +ㅤ on October 27, 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.*