# eViewer vs BuilderCalc

The clearest difference is in-app purchases: eViewer at none against BuilderCalc's 3. eViewer also leads on iOS requirement (13.0 vs 16.0). BuilderCalc's advantage is update cadence (every 4 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. BuilderCalc sells 3 in-app purchases, starting at $3.99 per month. eViewer asks for nothing beyond the download.

eViewer ships an update every 4 months, BuilderCalc every 4 days. The most recent releases landed on September 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | eViewer | BuilderCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Size | 13 MB | 1 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cegasa Energia, Sociedad Limitada](https://appshunter.io/developer/1598090257) | [Double Vision USA LLC](https://appshunter.io/developer/1894678139) |

## What reviewers say

### eViewer

[App page](https://appshunter.io/ios/app/eviewer/id1598090105)

**Features:** macOS Compatibility

**In-app purchases:** none


### BuilderCalc

[App page](https://appshunter.io/ios/app/buildercalc-deck-framing/id6763315412)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $29.99 | per year |
| Pro Unlock | $74.99 | one-time |


## Frequently asked questions

### Is eViewer free?

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

### Is BuilderCalc free?

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

### Do eViewer or BuilderCalc have ads?

Neither eViewer nor BuilderCalc shows ads.

### Which is updated more often, eViewer or BuilderCalc?

eViewer ships an update every 4 months, and BuilderCalc every 4 days. Most recently, eViewer was updated on September 14, 2026 and BuilderCalc on October 5, 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.*