# Construction Calculator vs Tether

The clearest difference is rating: Tether at 5.0 against Construction Calculator's 4.3. Tether also leads on in-app purchases (none vs 5) and update cadence (every 2 days vs every 6 weeks). Construction Calculator's advantage is ratings volume (47 vs 3) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Construction Calculator sells 5 in-app purchases, starting at $4.99 per 7 days. Tether asks for nothing beyond the download.

Tether holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Construction Calculator has 47 ratings behind it against 3, so its average is the more settled of the two.

Construction Calculator ships an update every 6 weeks, Tether every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Construction Calculator | Tether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (47 ratings)](https://appshunter.io/ios/app/construction-calculator-xcal/id6768104883/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tether-group-safety/id6771774490/reviews)** |
| Number of ratings | **47** | 3 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Monetization | Freemium | **Free** |
| Size | 59 MB | 15 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Abdulmonem Dakheel](https://appshunter.io/developer/1772458822) | [Tether Safety LLC](https://appshunter.io/developer/6771774492) |

## What reviewers say

### Construction Calculator

[App page](https://appshunter.io/ios/app/construction-calculator-xcal/id6768104883)

This app provides professional construction calculations and conversions for contractors and DIYers. It offers tools for feet and inches, metric measurements, material estimation, and advanced construction tasks like roof pitch and stair layouts. Simplify your jobsite work with accurate and fast results.

**Highlights:** Feet & inch calculations, Metric conversions, Fractions & decimals, Area & volume calculations, Roof pitch & angles, Material estimators, Stair & stud layouts

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $7.99 | per month |
| Yearly | $19.99 | per year |
| lifetime access | $19.99 | one-time |
| lifetime access | $24.99 | one-time |


### Tether

[App page](https://appshunter.io/ios/app/tether-group-safety/id6771774490)

This app creates temporary, location-aware groups for events. A host sets a geofence and duration, and guests join via QR code. It provides a live map with alerts and automatically deletes all location data when the event ends.

**Highlights:** Temporary geofencing for events, QR code invites, no account needed, Live group map with zone alerts, Automatic location data deletion, Privacy-focused, no data sold, Battery-efficient location tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Construction Calculator free?

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

### Is Tether free?

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

### Which has better reviews, Construction Calculator or Tether?

Tether is rated higher. Construction Calculator averages 4.3 out of 5 from 47 ratings, while Tether averages 5.0 from 3 ratings.

### Do Construction Calculator or Tether have ads?

Neither Construction Calculator nor Tether shows ads.

### Which is updated more often, Construction Calculator or Tether?

Construction Calculator ships an update every 6 weeks, and Tether every 2 days. Most recently, Construction Calculator was updated on October 31, 2026 and Tether on October 31, 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.*