# Units vs Sanborn Propane

The clearest difference is in-app purchases: Sanborn Propane at none against Units's 3. Sanborn Propane also leads on ads (none vs shown) and iOS requirement (12.2 vs 17.0). Units's advantage is update cadence (monthly vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Units sells 3 one-off in-app purchases. Sanborn Propane asks for nothing beyond the download.

Units ships an update monthly, Sanborn Propane every 4 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Units | Sanborn Propane |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (51 ratings)](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017/reviews)** | — |
| Number of ratings | **51** | — |
| Positive reviews | 60.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 86 MB | 56 MB |
| Requires iOS | 17.0 | **12.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Homegrown Software Ltd](https://appshunter.io/developer/406645730) | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) |

## What reviewers say

### Units

[App page](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017)

Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.

**Highlights:** Hundreds of units across 43 categories, Daily updated currency exchange rates, Hide unused units, Reorder units and categories, Universal app support (iPhone, iPod touch, iPad)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |

**What reviewers like**

- 🚀 Efficient and fast conversions
- 👍 Comprehensive list of units
- 🔍 Customizable unit selection
- 💰 Free app with optional paid version
- 🔧 Useful for engineering and technical work

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🕰️ Outdated currency conversion rates
- 🔍 Too many unit categories, hard to navigate
- 💰 Ads in free version
- 📏 Ruler feature not accurate on some devices

**Reported bugs**

- Crashes when clearing input fields
- Numerical keypad covers conversion results
- Incompatibility issues with newer iOS versions
- Ruler measurements not accurate on all devices

**Requested features**

- Add nautical units (miles, knots)
- Improve currency conversion accuracy and updates
- Allow customization of visible unit categories
- Add more clothing/shoe size conversions
- Improve user interface and search functionality


### Sanborn Propane

[App page](https://appshunter.io/ios/app/sanborn-propane/id6480134407)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Units free?

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

### Is Sanborn Propane free?

Sanborn Propane is free to download, with no in-app purchases.

### Do Units or Sanborn Propane have ads?

Units shows ads; Sanborn Propane does not.

### Which is updated more often, Units or Sanborn Propane?

Units ships an update monthly, and Sanborn Propane every 4 months. Most recently, Units was updated on November 1, 2026 and Sanborn Propane on November 4, 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.*