# mitmproxy client by txthinking vs SMTP Tester Pro

The clearest difference is price: SMTP Tester Pro at $3.99 against mitmproxy client by txthinking's $24.99. SMTP Tester Pro also leads on update cadence (every 6 weeks vs every 3 months). mitmproxy client by txthinking's advantage is review sentiment (100% vs 75%) and chart position (#119 vs unranked). On ads, in-app purchases, monetization model and device support there is nothing between them.

mitmproxy client by txthinking costs $24.99 and SMTP Tester Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

mitmproxy client by txthinking ships an update every 3 months, SMTP Tester Pro every 6 weeks. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | mitmproxy client by txthinking | SMTP Tester Pro |
| --- | --- | --- |
| Price | $24.99 | **$3.99** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mitmproxy-client-by-txthinking/id1528537342/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Paid | Paid |
| Best chart rank | **#119** | — |
| Size | 176 MB | 4 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [TxThinking, Inc.](https://appshunter.io/developer/1634589596) | [Dorian Borovina](https://appshunter.io/developer/1772141221) |

## What reviewers say

### mitmproxy client by txthinking

[App page](https://appshunter.io/ios/app/mitmproxy-client-by-txthinking/id1528537342)

**Currently charting:** #119 Top Paid · Developer Tools (US App Store)

This helper app captures and assembles IP packets into TCP and SOCKS5 streams for analysis. It allows interception and modification of HTTP/HTTPS traffic, saving conversations for replay, and reverse proxying. Requires a desktop installation of mitmproxy.

**Highlights:** Captures IP packets and assembles TCP/SOCKS5 streams, Intercepts and modifies HTTP/HTTPS requests/responses, Saves and replays HTTP conversations, Reverse proxy mode, On-the-fly SSL/TLS certificate generation

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is mitmproxy client by txthinking free?

mitmproxy client by txthinking costs $24.99, with no in-app purchases.

### Is SMTP Tester Pro free?

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

### Do mitmproxy client by txthinking or SMTP Tester Pro have ads?

Neither mitmproxy client by txthinking nor SMTP Tester Pro shows ads.

### Which is updated more often, mitmproxy client by txthinking or SMTP Tester Pro?

mitmproxy client by txthinking ships an update every 3 months, and SMTP Tester Pro every 6 weeks. Most recently, mitmproxy client by txthinking was updated on October 18, 2026 and SMTP Tester Pro on October 15, 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.*