# Construction Calculator Pro #1 vs Tether

The clearest difference is rating: Tether at 5.0 against Construction Calculator Pro #1's 4.5. Tether also leads on update cadence (daily vs every 12 months). Construction Calculator Pro #1's advantage is ratings volume (97 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Tether holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Construction Calculator Pro #1 has 97 ratings behind it against 3, so its average is the more settled of the two.

Construction Calculator Pro #1 ships an update every 12 months, Tether daily. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Construction Calculator Pro #1 | Tether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (97 ratings)](https://appshunter.io/ios/app/construction-calculator-pro-1/id6748603879/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tether-group-safety/id6771774490/reviews)** |
| Number of ratings | **97** | 3 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Daily** |
| Monetization | Free | Free |
| Size | 15 MB | 15 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Oryx](https://appshunter.io/developer/1778234263) | [Tether Safety LLC](https://appshunter.io/developer/6771774492) |

## What reviewers say

### Construction Calculator Pro #1

[App page](https://appshunter.io/ios/app/construction-calculator-pro-1/id6748603879)

This app provides advanced construction math tools for builders and contractors. It offers precise calculations for framing, material estimation, and complex angles, helping to reduce errors and save time on the job.

**Highlights:** Dimensional conversions (feet-inch, decimal, metric), Rafter, stair, and angle calculations, Area, volume, and material estimations, Roofing, drywall, and siding estimates, Quick input with preset fraction buttons

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

**In-app purchases:** none


### Tether

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

This app creates temporary, location-aware groups for events. Hosts set a geofence and duration, and guests join easily via QR code. It provides a live map with alerts if anyone leaves the zone, and all data is automatically deleted when the event ends.

**Highlights:** Temporary group creation, Instant geofencing, QR code invites, Live group map, Zone alerts, Automatic data deletion, Battery-friendly

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

**In-app purchases:** none


## Frequently asked questions

### Is Construction Calculator Pro #1 free?

Construction Calculator Pro #1 is free to download, with no in-app purchases.

### Is Tether free?

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

### Which has better reviews, Construction Calculator Pro #1 or Tether?

Tether is rated higher. Construction Calculator Pro #1 averages 4.5 out of 5 from 97 ratings, while Tether averages 5.0 from 3 ratings.

### Do Construction Calculator Pro #1 or Tether have ads?

Neither Construction Calculator Pro #1 nor Tether shows ads.

### Which is updated more often, Construction Calculator Pro #1 or Tether?

Construction Calculator Pro #1 ships an update every 12 months, and Tether daily. Most recently, Construction Calculator Pro #1 was updated on October 24, 2026 and Tether on October 13, 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.*