# Caller IP Mobile vs Mailer

The clearest difference is in-app purchases: Caller IP Mobile at none against Mailer's 5. Caller IP Mobile also leads on iOS requirement (10.0 vs 13.0). Mailer's advantage is update cadence (every 3 weeks vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Mailer sells 5 in-app purchases, starting at $3.99 per 7 days. Caller IP Mobile asks for nothing beyond the download.

Caller IP Mobile ships an update every 5 weeks, Mailer every 3 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Caller IP Mobile | Mailer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (30 ratings)](https://appshunter.io/ios/app/mailer-ai-email-assistant/id6504745156/reviews)** |
| Number of ratings | — | **30** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 20 MB | 127 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Caller IP Inc](https://appshunter.io/developer/1246609553) | [Lascade](https://appshunter.io/developer/1703521232) |

## What reviewers say

### Caller IP Mobile

[App page](https://appshunter.io/ios/app/caller-ip-mobile/id1246609554)

Connect your Rinble VoIP phone service to your mobile device. This application allows you to use your existing Rinble number for calls and manage your account on the go.

**Highlights:** Pair Rinble VoIP with mobile, Use Rinble number for calls, Mobile account management, Voice-over-IP integration

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

**In-app purchases:** none


### Mailer

[App page](https://appshunter.io/ios/app/mailer-ai-email-assistant/id6504745156)

This AI-powered tool simplifies email writing by generating, translating, and optimizing messages. It offers customizable templates and helps users create professional, impactful emails efficiently. Ideal for anyone looking to enhance their email communication.

**Highlights:** AI-powered email generation, Email content optimization, Customizable email templates, Professional email formatting, Language translation for emails

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Offer Price | $3.99 | per 7 days |
| Weekly Subscription | $7.99 | per 7 days |
| Yearly Offer | $24.99 | per year |
| Yearly Subscription | $49.99 | per year |
| Life Time Access | $79.99 | one-time |


## Frequently asked questions

### Is Caller IP Mobile free?

Caller IP Mobile is free to download, with no in-app purchases.

### Is Mailer free?

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

### Do Caller IP Mobile or Mailer have ads?

Neither Caller IP Mobile nor Mailer shows ads.

### Which is updated more often, Caller IP Mobile or Mailer?

Caller IP Mobile ships an update every 5 weeks, and Mailer every 3 weeks. Most recently, Caller IP Mobile was updated on November 2, 2026 and Mailer on November 4, 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.*