# SMTP Tester Pro vs JSON Navigator

The clearest difference is update cadence: JSON Navigator at every 2 weeks against SMTP Tester Pro's every 6 weeks. JSON Navigator also leads on price ($0.99 vs $3.99) and chart position (#106 vs unranked). SMTP Tester Pro's advantage is review sentiment (75% vs 67%). On ads, in-app purchases, monetization model and device support there is nothing between them.

SMTP Tester Pro costs $3.99 and JSON Navigator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SMTP Tester Pro ships an update every 6 weeks, JSON Navigator every 2 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SMTP Tester Pro | JSON Navigator |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/json-navigator/id6740144978/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | **75.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#106** |
| Size | 4 MB | 1 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dorian Borovina](https://appshunter.io/developer/1772141221) | [Chase Higgins](https://appshunter.io/developer/1788526218) |

## What reviewers say

### SMTP Tester Pro

[App page](https://appshunter.io/ios/app/smtp-tester-pro-email-test/id6736591154)

This application helps developers and IT professionals test and debug SMTP connections. It offers an intuitive interface for configuring servers, composing emails, and analyzing detailed transaction logs. Predefined templates for popular services and custom template management simplify setup and troubleshooting.

**Highlights:** SMTP server configuration, Support for various authentication methods, Multiple TLS modes, Customizable timeout settings, Email composition with CC/BCC, Template management, Detailed SMTP transaction logs

**Features:** macOS Compatibility

**In-app purchases:** none


### JSON Navigator

[App page](https://appshunter.io/ios/app/json-navigator/id6740144978)

**Currently charting:** #106 Top Paid · Developer Tools (US App Store)

This app transforms JSON data into interactive, visualized trees directly within Safari. It offers instant visualization, data type indicators, and easy navigation through complex structures. Customize your viewing experience with light and dark themes.

**Highlights:** Instant JSON visualization, Interactive tree-view interface, Data type indicators, Expand/collapse nodes, Customizable light/dark themes

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

**In-app purchases:** none


## Frequently asked questions

### Is SMTP Tester Pro free?

SMTP Tester Pro costs $3.99, with no in-app purchases.

### Is JSON Navigator free?

JSON Navigator costs $0.99, with no in-app purchases.

### Do SMTP Tester Pro or JSON Navigator have ads?

Neither SMTP Tester Pro nor JSON Navigator shows ads.

### Which is updated more often, SMTP Tester Pro or JSON Navigator?

SMTP Tester Pro ships an update every 6 weeks, and JSON Navigator every 2 weeks. Most recently, SMTP Tester Pro was updated on October 27, 2026 and JSON Navigator on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*