# Cardog vs Stamp Mail

The clearest difference is in-app purchases: Cardog at none against Stamp Mail's 4. Stamp Mail's advantage is update cadence (every 2 weeks vs every 7 months) and ratings volume (3 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Stamp Mail sells 4 in-app purchases, starting at $20.00 per month. Cardog asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Cardog against 5.0 for Stamp Mail. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Cardog ships an update every 7 months, Stamp Mail every 2 weeks. The most recent releases landed on September 15, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | Cardog | Stamp Mail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/cardog/id6745766069/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/stamp-mail/id6748666316/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 101 MB | 76 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Samuel Sullivan Delgobbo](https://appshunter.io/developer/1812824816) | [Stamp AI, Inc.](https://appshunter.io/developer/1826931069) |

## What reviewers say

### Cardog

[App page](https://appshunter.io/ios/app/cardog/id6745766069)

This app provides comprehensive automotive knowledge and management tools for car owners. It offers smart vehicle search, market intelligence, personal garage management, recall information, and fuel tracking. Utilize AI insights to make informed decisions throughout the car buying and ownership journey.

**Highlights:** Smart vehicle search with advanced filters, Real-time market intelligence and pricing, Personal garage for vehicle management, Comprehensive recall and safety database, Fuel price tracking and comparison, AI-powered automotive advice

**Features:** macOS Compatibility

**In-app purchases:** none


### Stamp Mail

[App page](https://appshunter.io/ios/app/stamp-mail/id6748666316)

This AI-powered email client automates tasks like drafting replies, prioritizing messages, and extracting to-dos. It offers an agent to retrieve information and reorganize your inbox using plain English commands. A special mode allows quick review and approval of automated changes.

**Highlights:** Automated email drafting, Email prioritization, To-do extraction, Email summarization, Information retrieval via AI agent, Inbox reorganization, Approve/reject agent changes

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stamp Individual (Monthly) | $20.00 | per month |
| Stamp Business (Monthly) | $50.00 | per month |
| Stamp Individual (Annual) | $191.99 | per year |
| Stamp Business (Annual) | $479.99 | per year |


## Frequently asked questions

### Is Cardog free?

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

### Is Stamp Mail free?

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

### Which has better reviews, Cardog or Stamp Mail?

Cardog and Stamp Mail are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Cardog or Stamp Mail have ads?

Neither Cardog nor Stamp Mail shows ads.

### Which is updated more often, Cardog or Stamp Mail?

Cardog ships an update every 7 months, and Stamp Mail every 2 weeks. Most recently, Cardog was updated on September 15, 2026 and Stamp Mail on July 4, 2026.

---

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