# MammonO vs Call Posters

The clearest difference is ads: MammonO at none against Call Posters's shown. Call Posters's advantage is update cadence (every 5 weeks vs every 8 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MammonO ships an update every 8 months, Call Posters every 5 weeks. The most recent releases landed on August 20, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | MammonO | Call Posters |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (76 ratings)](https://appshunter.io/ios/app/call-posters-call-theme/id6474707981/reviews)** |
| Number of ratings | — | **76** |
| Positive reviews | — | 14.6% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 132 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [mammono company limited](https://appshunter.io/developer/1640898132) | [Truong Nguyen](https://appshunter.io/developer/1602339577) |

## What reviewers say

### MammonO

[App page](https://appshunter.io/ios/app/mammono/id1640898130)

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

**In-app purchases:** none


### Call Posters

[App page](https://appshunter.io/ios/app/call-posters-call-theme/id6474707981)

Personalize your incoming and outgoing calls with a wide variety of visually appealing themes. Easily customize your call screen to match your mood or style, and enjoy advanced features like dynamic and seasonal themes. Make every call a unique and expressive experience.

**Highlights:** Customize call screens with themes, Wide range of theme collections, Dynamic and seasonal themes, Caller ID with style, Easy-to-use interface, Intuitive theme discovery

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

**In-app purchases:** none

**What reviewers like**

- 🖼️ Beautiful and aesthetically pleasing wallpaper images
- 💰 Free to download and use
- 📱 Works well as phone wallpapers and call screen backgrounds
- 🎨 Good variety of image categories available
- ⚡ Offline functionality when WiFi/data is disabled

**What reviewers complain about**

- 📢 Excessive and intrusive advertisements
- 🤥 Misleading advertising - not actually 3D as advertised
- 😤 Limited selection of wallpapers and categories
- 🚫 Functionality doesn't match app description
- ⚠️ False promises about customization features

**Reported bugs**

- App crashes immediately upon opening
- Cannot uninstall app from device
- Wallpapers not saving to photos properly
- Call posters don't function as actual call screens
- App freezes when selecting wallpapers

**Requested features**

- Actual 3D wallpaper functionality
- Customizable wallpapers with user's name/text
- Search feature to find specific wallpapers
- Turkish language support
- Working call screen customization


## Frequently asked questions

### Is MammonO free?

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

### Is Call Posters free?

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

### Do MammonO or Call Posters have ads?

Call Posters shows ads; MammonO does not.

### Which is updated more often, MammonO or Call Posters?

MammonO ships an update every 8 months, and Call Posters every 5 weeks. Most recently, MammonO was updated on August 20, 2026 and Call Posters on August 18, 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.*