# Semaphor > Secure team communication and collaboration app with end-to-end encryption. (iPhone/iPad app by SpiderOak, Inc..) - Source: https://appshunter.io/ios/app/semaphor/id1093566063 (this page in markdown: same URL + `.md`) - Developer: [SpiderOak, Inc.](https://appshunter.io/developer/360584374) - Category: Productivity, Business - Price: Free with in-app purchases - Rating: 3.50/5 from 15 App Store ratings · 13 written reviews indexed - Age rating: 4+ - Requires: iOS 10.0 · 19 MB - Languages: American English - Released: 2016-06-27 - Data updated: 2026-06-01 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/semaphor/id1093566063/reviews.md ## What is Semaphor? Semaphor combines the best features of collaboration apps and encrypted messaging apps. Your team can work together through team messages, direct messages, and file sharing. Semaphor is secured by the power of private blockchain and end-to-end encryption. Semaphor brings you and your team: › End-to-end encryption to protect every file and conversation › Fast file uploads › Secure file sharing › Private direct messaging › Unlimited, project-specific channels › Real-time communication and collaboration › Password-less account creation › Native offline mode › Mobile and desktop friendly › Enterprise and LDAP ready › Supports bots and integrations › HIPAA/FINRA/FIRPA compliant › Reviewable source code To find out more about Semaphor, visit our website or send us an email. We always welcome your feedback and suggestions. ----- Subscriptions: - Basic: Free 30-day conversation history - Standard: Unlimited conversation history and access to Standard channels. $8.99/month - Pro: Unlimited conversation history and access to Pro channels. Team admin pays for all team members. $8.99/user/month - Payments will be charged to iTunes Account at confirmation of purchase. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Your account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions may be managed by you and auto-renewal may be turned off by going to the your Account Settings after purchase. ----- By installing this app you agree to SpiderOak's: Privacy Policy, https://spideroak.com/policy/privacy-policy Term of Use, https://spideroak.com/policy/terms-of-use Service Agreement, https://spideroak.com/policy/service-agreement ## Key features - End-to-end encryption - Secure file sharing - Private direct messaging - Unlimited project channels - Real-time collaboration - Native offline mode ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Personal Plan Monthly | $8.99 | per month | ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/semaphor/id1093566063/reviews.md ### 5/5 — RIP *2023-11-14* Thank you for helping me that one time when no other app was able to. Or maybe signal was, but still. ### 1/5 — Bad on notification *2021-03-18* You don't even know you have a message unless you actively check the app. There's no badge or anything unless you happen to be staring at your screen when it comes through. It's pointless to send feedback to the developers because they don't follow-up. This app hasn't even been updated in over 2 years!! ### 1/5 — Appreciate that they tried, but *2020-06-08* Was the interface written and never tested? Or was the intent that it not work? Perhaps it secretly implants a virus or trojan??? Tried to invite a new person to get the app and use it with me. Couldn’t write the message because the text composing box was off-screen in both the vertical and the horizontal orientations. Even though I could type stuff in, I couldn’t send a message because the SEND button was also below the bottom edge of the screen. If an apparently reputable company such as Spideroak makes an app with such glaring blunders (as basic unusability) you have to wonder about their motivations. Hey, y’all, listening? Fix it and get back to me, k? It’s: 2020.06.08 FFS! How could you do so badly? Who would trust anything else you do — I would not.... ### 2/5 — UX is very aweful *2019-04-07* Newer iPhones screen sizes are not supported, the app looks outdated. ### 1/5 — iPhone X Support *2019-03-10* The screen isn't designed for the iPhone X line of phones. Not really a fan of the UI either, but I can't begin to see the usefulness when the app is letterboxed. ### 3/5 — iPhone X Support Required *2018-03-21* Why this update would not include iPhone X display support? Waited long enough for an update. ### 2/5 — Great security, mediocre everything else *2017-08-17* I appreciate that Semaphor provides a much more private and secure alternative to Slack. But its user experience is inferior to Slack in every way; and that makes it harder to use and harder to persuade others to use, and thus makes its security and privacy benefits illusory. ### 3/5 — No support for landscape in iOS *2017-01-10* Hoping to use this with my iPad Pro and keyboard, and lo...it doesn't rotate. Drops the utility for me significantly. Would like to have better control over notifications, the current options are very narrow. Feels raw, but appears to work as designed...the ability to setup channels is a real plus. ### 3/5 — Could be great, but... *2016-11-04* I'm a fan of all things SpiderOak, but Semaphor is a bit of a tease. If the notifications worked and you didn't have to constantly scroll down to read new messages between two users it would be awesome. Other than those two issues it's great, but if I don't get notifications then what is the point? If you leave the app open they usually come through, but no notifications at all if it's closed. ### 3/5 — The way forward *2016-11-01* Like the concept and the privacy, however the 30 day policy for keeping messages its a big setback ## Frequently asked questions about Semaphor ### What is Semaphor? Semaphor is a productivity app that combines team messaging and collaboration features with strong security measures like end-to-end encryption and private blockchain technology. ### What are the subscription options for Semaphor? Semaphor offers a free Basic plan with 30-day conversation history. Paid plans include Standard and Pro, both at $8.99/month, offering unlimited conversation history and access to specific channels. Team admins can pay for all team members in the Pro plan. ### How does Semaphor handle subscriptions and renewals? Payments for Semaphor subscriptions are charged to your iTunes Account upon purchase confirmation. Subscriptions automatically renew unless auto-renewal is turned off at least 24 hours before the current period ends. You can manage subscriptions in your Account Settings. ### Is Semaphor available on multiple devices? Yes, Semaphor is designed to be mobile and desktop friendly, supporting iPhones, iPads, and iPods. It also offers an enterprise and LDAP ready solution. ### What security features does Semaphor offer? Semaphor is secured by private blockchain and end-to-end encryption, protecting every file and conversation. It also supports HIPAA/FINRA/FIRPA compliance and has reviewable source code. ### Does Semaphor have ads? No, Semaphor does not contain advertisements. The app is free to download and use, with optional paid subscription tiers for enhanced features. ### How often is Semaphor updated? The latest version of Semaphor is 2.2.0, which was last updated on October 11, 2018. Information on update frequency beyond this is not provided. ### What is the age rating for Semaphor? Semaphor has an age rating of 4+, making it suitable for a wide range of users. This rating is based on its content and suitability for younger audiences. ## Version history (last 5 releases) ### 2.2.0 — 2018-10-11 This version of Semaphor improves on the updated look that we rolled out in April and continues to bring new features and fixes from our development team. Our teams have been working tirelessly to not only implement changes you asked for, but to find better ways to execute the features you already enjoyed. Your feedback, suggestions, and reports make a huge difference to our team. Please don’t ever hesitate to reach out to us through support.spideroak.com, @SpiderOak on Twitter or on Facebook at facebook.com/SpiderOak. ## New Features: - Add notice for data storage - Updated styling - Removed URIs - Update device OS/version identification code - Upload all file types from Android ## Bug Fixes: - Fixed Android attachment error - Fixed back-button Android corner cases - Mobile rendering improvements - Large screen improvements - Channel switcher improvements - Channel search improvements - Fixed channel selection error when adding team members - Fixed multiple activation in team/channel creation - Fixed broken channel view after leaving team - Team switcher improvements - Fixed avatar change not working - Fixed input context menu not appearing when spellcheck is unavailable - Dialog improvements - Autocomplete improvements\ - Fixed devices sort order - Fixed About dialogue - Scrolling improvements - Fixed code injection in Markdown URL parsing - Fixed HTML injection in editor mention tag - Added page reload mitigation for desktop - Confirmation code improvements - Update Electron to disable its executable stack - Adjusted pattern matching so that display names will be highlighted in a message even when it’s adjacent to a non-word character ### 2.1.2 — 2018-05-09 Bug Fixes: - Security improvements ### 2.1.0 — 2018-04-16 # Semaphor 2.1.0 Release Notes 16 April 2018 This version of Semaphor completes the transition to the new look and feel with a new icon set and loading screen. We will be nostalgic for the old 8-bit look, but we hope you enjoy the clean design and snappier response of the user interface. The SpiderOak design team continues their stellar work! Our goal is to make Semaphor user friendly and secure. One of the most vital components in doing this is the feedback we received from Semaphor users. Your feedback, suggestions, and reports make a huge difference to our team. Please don’t ever hesitate to reach out to us through support.spideroak.com, @SpiderOak on Twitter or on Facebook at facebook.com/SpiderOak. Thanks again for using Semaphor! ## New Features: * New loading screen * New mobile splash screen * New application and installer icons * Direct Message creation screen improvements * Many additional UX/UI improvements ## Bug Fixes: * Fixed text overflows * Fixed active search/channel creation icons * Fix deselect all in auto-join channels * Fix broken redirect to main view after converting your account to LDAP control * Fixed mention picker not showing current users * Fixed Windows >=8 notifications * Fixed scrolling in join requests/channel add flow * Added "out-of-date client" as a possible cause for account login failure * Fixed user profile display so that it shows the admin badge when you're the admin of a channel and you access your profile from the channel member list * Fix sync stalling with new pause/resume implementation * Fixed empty blank space to the right on iPad * Changed DM creation to always create a conversation in the team you're looking at, not the selected team * Fixed inability to view complete channel list if top menu is open * Re-added no users indicator for channel invite ### 2.0.1 — 2018-03-27 Bug Fixes: Fix sync stalling with new pause/resume implementation ### 2.0.0 — 2018-03-06 # Semaphor 2.0.0 Release Notes We’ve reached a major milestone with Semaphor version 2.0.0. Since our last major public release in June 2017, everything about Semaphor has been examined, improved, and polished. A huge part of this process has been the feedback we received from Semaphor users. Your feedback, suggestions, and reports make a huge difference to our team. Please don’t ever hesitate to reach out to us through support.spideroak.com, @SpiderOak on Twitter or on Facebook at facebook.com/SpiderOak. The first thing you’ll notice when you download Semaphor is the redesigned UI. Our design team has done amazing work to take the original vision of Semaphor and bring it to life through the new UI and UX. We hope you’ll enjoy using it as much as we do. (The entire SpiderOak team uses Semaphor for all of our team communications and we love the new look and feel!) To learn more about Semaphor, how we use end-to-end encryption with private blockchain, or about any of our other applications please visit spideroak.com. ## Improvements Redesigned UI UX improvements Sync improvements Scrolling improvements ## Fixes Various bug fixes Enhanced error messaging Removed username signup ## New Features Added mobile landscape support ## Apps similar to Semaphor | App | Rating | Price | Category | | --- | --- | --- | --- | | [Nextcloud](https://appshunter.io/ios/app/nextcloud/id1125420102) | 4.7 (10,378) | Free | Productivity | | [pCloud - Cloud Storage](https://appshunter.io/ios/app/pcloud-cloud-storage/id692002098) | 4.7 (1,261) | Free | Productivity | | [Yubico Authenticator](https://appshunter.io/ios/app/yubico-authenticator/id1476679808) | 3.7 (268) | Free | Productivity | | [Proton Mail - Encrypted Email](https://appshunter.io/ios/app/proton-mail-encrypted-email/id979659905) | 4.7 (43,932) | Free | Productivity | | [Proton Drive: Cloud Storage](https://appshunter.io/ios/app/proton-drive-cloud-storage/id1509667851) | 4.1 (965) | Free | Productivity | | [Proton Calendar: Secure Events](https://appshunter.io/ios/app/proton-calendar-secure-events/id1514709943) | 4.0 (1,251) | Free | Productivity | ## More apps by SpiderOak, Inc. - [SpiderOak CrossClave](https://appshunter.io/ios/app/spideroak-crossclave/id1570911952) All apps by SpiderOak, Inc.: https://appshunter.io/developer/360584374 ## Related topics [semaphor](https://appshunter.io/ios/topics/semaphor) · [semaphore](https://appshunter.io/ios/topics/semaphore) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*