# ZeroBounce vs Post SMTP

The clearest difference is review sentiment: ZeroBounce at 100% against Post SMTP's 0%. ZeroBounce also leads on update cadence (every 9 days vs every 6 weeks). Post SMTP's advantage is iOS requirement (13.4 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. ZeroBounce sells 7 one-off in-app purchases and Post SMTP sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ZeroBounce ships an update every 9 days, Post SMTP every 6 weeks. The most recent releases landed on October 9, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | ZeroBounce | Post SMTP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zerobounce/id1671793296/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 68 MB | 23 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZeroBounce](https://appshunter.io/developer/1671793298) | [Ahmed ElDin](https://appshunter.io/developer/516932416) |

## What reviewers say

### ZeroBounce

[App page](https://appshunter.io/ios/app/zerobounce/id1671793296)

This service offers a fast and secure way to validate email addresses, ensuring your messages reach their intended recipients. It helps improve open rates and ROI with high accuracy, AI-driven scoring, and deliverability tools.

**Highlights:** Email list validation, Real-time bulk checking, AI-driven email scoring, Deliverability tools, Blacklist alerts

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2000 credits | $39.00 | one-time |
| 5000 credits | $69.00 | one-time |
| 10000 credits | $129.00 | one-time |
| 25000 credits | $274.99 | one-time |
| 50000 credits | $499.00 | one-time |
| 100000 credits | $649.00 | one-time |
| 250000 credits | $1000.00 | one-time |


### Post SMTP

[App page](https://appshunter.io/ios/app/post-smtp/id6473368559)

Monitor WordPress email delivery and troubleshoot failures from your mobile device. Get instant notifications for issues, preview email content, and resend failed messages with ease. Connect to multiple WordPress sites and various SMTP services.

**Highlights:** Email delivery monitoring, Failure notifications, Resend failed emails, Email content preview, Multiple site support, SMTP service integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Access | $4.99 | per month |
| Annual Pro Access | $39.99 | per year |


## Frequently asked questions

### Is ZeroBounce free?

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

### Is Post SMTP free?

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

### Do ZeroBounce or Post SMTP have ads?

Neither ZeroBounce nor Post SMTP shows ads.

### Which is updated more often, ZeroBounce or Post SMTP?

ZeroBounce ships an update every 9 days, and Post SMTP every 6 weeks. Most recently, ZeroBounce was updated on October 9, 2026 and Post SMTP on September 26, 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.*