# AuthorityBuy vs Delta Echos App

AuthorityBuy and Delta Echos App are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

AuthorityBuy ships an update every 4 weeks, Delta Echos App every 2 weeks. The most recent releases landed on October 27, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | AuthorityBuy | Delta Echos App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 2 weeks** |
| Size | 26 MB | 163 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Belt Tecnologia LTDA](https://appshunter.io/developer/1586874532) | [Delta Fire Ltda](https://appshunter.io/developer/1769413077) |

## What reviewers say

### AuthorityBuy

[App page](https://appshunter.io/ios/app/authoritybuy/id1586874530)

**Features:** macOS Compatibility

**In-app purchases:** none


### Delta Echos App

[App page](https://appshunter.io/ios/app/delta-echos-app/id6779369713)

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

**In-app purchases:** none


## Frequently asked questions

### Is AuthorityBuy free?

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

### Is Delta Echos App free?

Delta Echos App is free to download, with no in-app purchases.

### Do AuthorityBuy or Delta Echos App have ads?

Neither AuthorityBuy nor Delta Echos App shows ads.

### Which is updated more often, AuthorityBuy or Delta Echos App?

AuthorityBuy ships an update every 4 weeks, and Delta Echos App every 2 weeks. Most recently, AuthorityBuy was updated on October 27, 2026 and Delta Echos App on November 10, 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.*