# Current Altitude vs GARDCO Viscosity Calc

The clearest difference is in-app purchases: GARDCO Viscosity Calc at none against Current Altitude's 1. GARDCO Viscosity Calc also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 14 months). Current Altitude's advantage is ratings volume (19K vs 6). On price, rating and device support there is nothing between them.

Both are free to download. Current Altitude sells 1 one-off in-app purchase. GARDCO Viscosity Calc asks for nothing beyond the download.

GARDCO Viscosity Calc holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Current Altitude has 19K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 72% of Current Altitude's written reviews are positive against 100% of GARDCO Viscosity Calc's.

Current Altitude ships an update every 14 months, GARDCO Viscosity Calc every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Current Altitude | GARDCO Viscosity Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (19K ratings)](https://appshunter.io/ios/app/current-altitude/id348408101/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/gardco-viscosity-calc/id1488629531/reviews)** |
| Number of ratings | **19K** | 6 |
| Positive reviews | 72.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 6 MB |
| Requires iOS | 18.0 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hearn Apps, LLC](https://appshunter.io/developer/310533788) | [BYK Gardner](https://appshunter.io/developer/1488629530) |

## What reviewers say

### Current Altitude

[App page](https://appshunter.io/ios/app/current-altitude/id348408101)

Track your current altitude and location with this GPS-powered utility. Save important spots, view coordinates in multiple formats, and easily share your position with others. Ideal for outdoor adventures and travel.

**Highlights:** GPS-powered location tracking, Save and reference locations, Multiple GPS format displays, Share location and altitude, Accurate altitude readings

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Removal | $4.99 | one-time |

**What reviewers like**

- 🚀 Accurate and responsive
- ⛰️ Useful for tracking elevation changes
- 📍 Provides GPS coordinates
- 🌍 Works well in remote areas
- 🔍 Helpful for outdoor activities

**What reviewers complain about**

- 🐛 Inconsistent or inaccurate readings
- 📱 Issues with compatibility on certain devices
- 💰 Concerns about hidden charges
- 📢 Excessive advertisements

**Reported bugs**

- App crashing or not loading properly
- Elevation readings fluctuating wildly
- Incompatibility with newer devices

**Requested features**

- Dark mode option
- Ability to save/export elevation data
- More customization options
- Improved accuracy and precision


### GARDCO Viscosity Calc

[App page](https://appshunter.io/ios/app/gardco-viscosity-calc/id1488629531)

Calculate kinematic viscosity or drain time for various viscosity cups. Input a known value and cup type to find the unknown, with visual indicators for valid measurement ranges. Helps select the appropriate cup for accurate testing.

**Highlights:** Calculate kinematic viscosity, Calculate drain time, Support for Gardco and BYK cups, Input drain time or viscosity, Visual range indicators, Error messages for out-of-range values

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Current Altitude free?

Current Altitude is free to download, with in-app purchases available.

### Is GARDCO Viscosity Calc free?

GARDCO Viscosity Calc is free to download, with no in-app purchases.

### Which has better reviews, Current Altitude or GARDCO Viscosity Calc?

GARDCO Viscosity Calc is rated higher. Current Altitude averages 4.8 out of 5 from 19K ratings, while GARDCO Viscosity Calc averages 5.0 from 6 ratings.

### Do Current Altitude or GARDCO Viscosity Calc have ads?

Current Altitude shows ads; GARDCO Viscosity Calc does not.

### Which is updated more often, Current Altitude or GARDCO Viscosity Calc?

Current Altitude ships an update every 14 months, and GARDCO Viscosity Calc every 3 weeks. Most recently, Current Altitude was updated on November 6, 2026 and GARDCO Viscosity Calc on November 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.*