# Calculator HD+ Pro vs Rift Valley Timer

The clearest difference is ratings volume: Calculator HD+ Pro at 99 against Rift Valley Timer's 3. Calculator HD+ Pro also leads on iOS requirement (10.0 vs 17.0). Rift Valley Timer's advantage is rating (5.0 vs 4.8) and review sentiment (100% vs 90%). On update cadence, ads, in-app purchases and device support there is nothing between them.

Calculator HD+ Pro costs $3.99 and Rift Valley Timer $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rift Valley Timer holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Calculator HD+ Pro has 99 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 90% of Calculator HD+ Pro's written reviews are positive against 100% of Rift Valley Timer's.

Calculator HD+ Pro ships an update every 3 weeks, Rift Valley Timer fortnightly. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Calculator HD+ Pro | Rift Valley Timer |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Rating | [4.8 (99 ratings)](https://appshunter.io/ios/app/calculator-hd-plus-pro/id465810912/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rift-valley-timer/id1448933389/reviews)** |
| Number of ratings | **99** | 3 |
| Positive reviews | 89.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Freemium** | Paid |
| Size | 31 MB | 11 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [smalltech sarl](https://appshunter.io/developer/289934568) | [Rift Valley Software, Inc.](https://appshunter.io/developer/1448933102) |

## What reviewers say

### Calculator HD+ Pro

[App page](https://appshunter.io/ios/app/calculator-hd-plus-pro/id465810912)

This app offers a high-precision calculation engine with a user-friendly interface. It allows for real-time formula display, multiple undo options, and workspace switching. Advanced features include persistent history, specialized keypads, and AirPrint compatibility.

**Highlights:** High precision engine, Result displayed while typing, Multiple undo, Switch between workspaces, Persistent history, Specialized keypad, AirPrint support

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

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive and easy to use
- 🚀 Efficient and fast calculations
- 💡 Helpful calculation history and workspaces
- 🎨 Sleek and modern design
- 🔒 Reliable and stable performance

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔊 Annoying key press sound
- 📱 Needs better optimization for larger screens
- 💰 Paid version not significantly different from free

**Reported bugs**

- Calculation history not always accurate
- Music playback issues when app is opened
- Location permission request not necessary

**Requested features**

- Customizable decimal places
- Memory function
- Conversion tools
- Ability to sync across devices


### Rift Valley Timer

[App page](https://appshunter.io/ios/app/rift-valley-timer/id1448933389)

This app provides a distraction-free countdown timer experience. Create and manage groups of sequential timers with customizable alerts and visual cues. Choose from multiple display styles for optimal visibility.

**Highlights:** Sequential timer groups, Customizable sounds and vibration, Flexible timer editing, Multiple display styles, Gesture and toolbar controls, Visual alerts with color cues

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator HD+ Pro free?

Calculator HD+ Pro costs $3.99, with no in-app purchases.

### Is Rift Valley Timer free?

Rift Valley Timer costs $1.99, with no in-app purchases.

### Which has better reviews, Calculator HD+ Pro or Rift Valley Timer?

Rift Valley Timer is rated higher. Calculator HD+ Pro averages 4.8 out of 5 from 99 ratings, while Rift Valley Timer averages 5.0 from 3 ratings.

### Do Calculator HD+ Pro or Rift Valley Timer have ads?

Neither Calculator HD+ Pro nor Rift Valley Timer shows ads.

### Which is updated more often, Calculator HD+ Pro or Rift Valley Timer?

Calculator HD+ Pro ships an update every 3 weeks, and Rift Valley Timer fortnightly. Most recently, Calculator HD+ Pro was updated on October 19, 2026 and Rift Valley Timer on October 15, 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.*