Wirelessly send articles, notes, and custom screensavers to your e-ink reader. Convert web content to EPUBs, import your own files, and manage content directly on the device. Enjoy a private, cloud-free experience over local WiFi.






105+ iOS apps curated and reviewed
Out of 105+ send to x4 apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (3) | No | No | Jul 2026 | |
| 2 | Free | 4.9★ (14) | No | No | Aug 2026 | |
| 3 | Free | 4.1★ (17K) | Yes | No | Sep 2026 | |
| 4 | Free | 4.9★ (2.7M) | No | No | Sep 2026 | |
| 5 | Free | 4.8★ (1.2M) | No | No | Sep 2026 | |
| 6 | Free | 4.9★ (5.8M) | No | No | Sep 2026 | |
| 7 | Free | 4.8★ (6.3M) | Yes | No | Sep 2026 | |
| 8 | Free | 4.8★ (8.7M) | No | No | Sep 2026 |






Wirelessly send articles, notes, and custom screensavers to your e-ink reader. Convert web content to EPUBs, import your own files, and manage content directly on the device. Enjoy a private, cloud-free experience over local WiFi.






Transform web pages into formatted EPUBs for your e-reader without using the cloud. Manage files and customize your device's wallpaper directly over WiFi. This app prioritizes privacy with no tracking or accounts.





Instantly share files, photos, videos, and music between devices without needing an internet connection or USB cable. This app offers lightning-fast transfers across different platforms, including phones and computers, with a built-in music player and file manager.


Send money internationally with a secure and reliable service. Supports over 170 countries and 100 currencies, with various delivery options including bank accounts, mobile wallets, and cash pickup. Offers business services for international payroll and payments.


Send money internationally quickly and securely. Track transfers in real-time, with transparent rates and no fees for recipients. Supports bank deposits, cash pickup, and mobile wallet transfers.


Access a vast library of eBooks, magazines, and comics on your mobile device. Customize your reading experience with adjustable text, brightness, and page-turning options. Look up words, track progress, and sync across devices.


Manage your finances with a secure app for online and in-store shopping, sending money globally, and earning cash back. It also offers savings accounts, cryptocurrency trading, and package tracking.


Easily send and receive money or bitcoin instantly. Save by rounding up change, invest in stocks or bitcoin, and get paid up to two days early with direct deposit. Features a customizable debit card with exclusive discounts.


Manage your money with a comprehensive financial app. Spend, send, and save across multiple currencies, invest in stocks, and track your spending with smart tools. Offers features for both adults and children's financial education.


Easily send money internationally to Africa, Asia, and the Middle East. This secure app offers fast, affordable transfers with transparent fees and real-time tracking. Manage mobile payments and support loved ones globally from your phone.


Explore the onchain ecosystem to create, trade, and earn with a global community. Trade millions of assets with low fees, engage with a social feed where posts can be traded, and access decentralized mini-apps for yield, gaming, or content. Securely chat with friends and manage your crypto and NFTs with self-custody.


Discover seasonal essentials, outfit ideas, and home decor. Shop deals on groceries, pantry staples, and gifts. Enjoy convenient services like curbside pickup and same-day delivery.


Manage your money internationally with ease. Send, receive, spend, and hold multiple currencies with competitive exchange rates and low fees. Get local bank details for global payments and a multi-currency card for spending worldwide.


Send money internationally with speed and security. This app offers seamless global money transfers with competitive exchange rates and reliable service, keeping you connected to family and friends worldwide.


This all-in-one payments processing app helps businesses of all types manage operations, accept payments, and boost profits. It offers industry-specific modes for retail, restaurants, services, and beauty businesses, with features like inventory management, online booking, and invoicing.


This app encourages sharing authentic daily moments with friends. A daily random notification gives users two minutes to capture a photo using both front and back cameras, with no filters or editing allowed. It focuses on genuine connections over curated perfection.


This application provides a flexible client for managing proxy servers with a user-friendly interface. It supports a wide range of protocols and offers advanced features like rule-based setup and custom DNS. Your network activity data remains private on your device.


Securely manage over 10 million digital assets, NFTs, and dApps across 100+ blockchains. Earn daily rewards on stablecoins with transparent, self-custodial protocols. Control your private keys and explore Web3 with confidence.


Securely buy, sell, trade, and store a wide range of cryptocurrencies. Manage your digital assets and explore prediction markets and stock trading within a unified portfolio. Earn rewards through staking and recurring buys.


Instantly translate text, voice, and images between hundreds of languages. Features include offline translation, real-time conversation translation, and the ability to save frequently used phrases.