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.






100+ iOS apps curated and reviewed
Out of 100+ 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 | Jul 2026 | |
| 3 | Free | 4.1★ (17K) | Yes | No | Jul 2026 | |
| 4 | Free | 4.7★ (70K) | No | No | Jul 2026 | |
| 5 | Free | 4.9★ (2.6M) | Yes | No | Jul 2026 | |
| 6 | Free | 4.6★ (161K) | No | No | Jul 2026 | |
| 7 | Free | 4.6★ (107K) | No | No | Jul 2026 | |
| 8 | Free | 4.8★ (1.2M) | Yes | No | Jul 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.


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.


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.


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.


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 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.


Easily buy, send, and trade popular cryptocurrencies like Bitcoin and Ethereum. Fund your account with a linked bank card and transact with friends for free. Instantly acquire crypto even while cash transactions are pending.


Transform your iPhone into a portable fax machine. Send and receive faxes internationally, supporting various file types. Get instant notifications and track your fax history.


Send and receive faxes directly from your iPhone or iPad without needing a physical fax machine. This app allows you to scan documents, upload various file types, and track the status of your sent faxes. It offers a dedicated number for receiving faxes globally.


Book affordable rides like bikes, autos, and taxis with just a few taps. This app also offers parcel delivery and food ordering services across many Indian cities.


Easily send any type of file, regardless of size or format, to any device or platform without needing an internet connection. Share photos, videos, music, and documents quickly and reliably.


Transfer photos, videos, music, and documents between iOS and Android devices quickly and securely. This app enables cable-free, internet-free sharing, making it ideal for moving data between phones or backing up files.


Share files between devices wirelessly and quickly, even large amounts of data. Connect with nearby users via GPS or QR codes. Secure your private files and chat offline with friends.


Seamlessly integrate your iPhone with your Windows PC. Access calls, messages, notifications, and contacts directly from your computer. Easily share files between devices for enhanced productivity.


Enhance your business's online security with this official authentication app. It adds an extra layer of protection to your account, preventing unauthorized access even if your password is compromised. Enjoy fast and secure logins with push notifications or offline verification codes.


Transform your mobile device into a powerful fax machine. Send and receive faxes securely from anywhere, scan documents, add electronic signatures, and manage your fax archive with ease. Offers HIPAA compliance for sensitive documents.


This app facilitates cashless and card-less transactions, allowing users to scan QRIS codes, send money to various bank accounts, and top up e-wallet balances. It also supports saving bank cards for seamless payments and managing mobile recharges and bill payments securely.


This ride-sharing app allows users to set their own prices for rides and choose their preferred drivers. It also offers opportunities for drivers to earn more with flexible schedules and low service fees. Safety features and 24/7 support are prioritized for both riders and drivers.