# Preview App vs SMTPTester

The clearest difference is chart position: SMTPTester at #154 against Preview App's unranked. SMTPTester also leads on device support (4 vs 2) and price ($0.99 vs $1.99). On update cadence, ads and in-app purchases there is nothing between them.

Preview App costs $1.99 and SMTPTester $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Preview App ships an update every 13 months, SMTPTester every 11 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Preview App | SMTPTester |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/smtptester-test-smtp-service/id1633950905/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 11 months** |
| Monetization | — | Paid |
| Best chart rank | — | **#154** |
| Size | 8 MB | 25 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Cangmu Technology Co., Ltd](https://appshunter.io/developer/1736424342) | [峰 高](https://appshunter.io/developer/1456326418) |

## What reviewers say

### Preview App

[App page](https://appshunter.io/ios/app/preview-app-store-simulator/id1626025800)

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

**In-app purchases:** none


### SMTPTester

[App page](https://appshunter.io/ios/app/smtptester-test-smtp-service/id1633950905)

**Currently charting:** #154 Top Paid · Developer Tools (US App Store)

This tool allows users to test SMTP server functionality by sending emails. It helps identify and log any errors encountered during the testing process.

**Highlights:** SMTP server testing, Email sending, Error logging, Server address input, User information input

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Preview App free?

Preview App costs $1.99, with no in-app purchases.

### Is SMTPTester free?

SMTPTester costs $0.99, with no in-app purchases.

### Do Preview App or SMTPTester have ads?

Neither Preview App nor SMTPTester shows ads.

### Which is updated more often, Preview App or SMTPTester?

Preview App ships an update every 13 months, and SMTPTester every 11 months. Most recently, Preview App was updated on October 30, 2026 and SMTPTester on October 30, 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.*