# GSM-RELAY > SMS-based remote control and configuration for industrial devices. (iPhone/iPad app by 艳丽 刘.) - Source: https://appshunter.io/ios/app/gsm-relay/id595567537 (this page in markdown: same URL + `.md`) - Developer: [艳丽 刘](https://appshunter.io/developer/595252190) - Category: Business, Utilities - Price: Free - Rating: 2.33/5 from 3 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 7.0 · 3 MB - Languages: English - Released: 2013-02-04 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gsm-relay/id595567537/reviews.md ## What is GSM? GSM-RELAY is a seven channels remote control device for industrial Control. Easy to use this software to send the SMS to Wafer GSM-RELAY device to do the remote control and remote parameters config. This application requires WAFER GSM-RELAY unit. ## Key features - Seven channels remote control - Send SMS for remote control - Remote parameter configuration - Industrial control applications - Requires WAFER GSM-RELAY unit ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/gsm-relay/id595567537/reviews.md ### 1/5 — App does not work with iso (Apple) *2023-03-18* When will this be fixed? ### 1/5 — To the developer *2023-01-15* This App has stopped working with my iPhone. I’ve used it for over 5 years. What’s wrong? When will this be resolved? ### 1/5 — Useless Garbage *2021-08-21, version 1.8* It serves no purpose and looks like it was made by someone in their basement 5 years ago. The hardware is okay but software and firmware are garbage. Looking for other options for control by SMS. These either don’t work in North America or are extremely limited in function. Great potential to be better but nobody cares to improve it or support it no matter how many you want to purchase. Phoenix Connect makes an SMS Relay but nobody seems to have any inventory around the world. ### 1/5 — Poor customer service *2019-06-08, version 1.8* I purchased a few devices from Waferstar and let me say that trying to work with this company to establish a confident relationship to market and resell these products is IMPOSSIBLE! The last model I purchased was the 4G version GSM-AUTO-AC, the documentation is full of errors, the APP “GSM-AUTO” does not exist in the App store, and the vendor does not respond to emails on this matter. So I have a unit I paid $140usd for and I am hamstringed on using it to it’s full potential. On the bright side the equipment seems to be well made, so I must assume that Waferstar is a reseller of the devices, because they have no idea how they work when questions arise. I am submitting this review via the App Store because any correspondence with Waferstar is impossible. ### 4/5 — Wow quick turn around on bugs! *2017-06-24* Reported app not sending any SMS commands on iOS 10, two days later a new release fixing the issue, great work guys thank you! ### 1/5 — AVOID PRODUCT AVOID APP *2015-04-04* Bought the GSM 7 Relay Unit and had high hopes and downloaded the APP. Have found the unit unreliable and the APP only seems to make it worse. The APP overall presentation is poor resembling the graphical skill of a 5 year old. Layout is cumbersome and clumsy. One screen allows you to toggle relay 2 -7 but the actual Unit does not permit this. So if you want to open and close a garage door you need to send 3 TXT meassages. Lastly Advertising! Why put advertising on this APP. Tried to contact Wafer about issues. They ignore me. Tried to contact the APP author he ignores me Did find Witura they have a much better unit that toggles all the relays or switches them and this can be a mix. The App they produce is much better and it is reliable ## Frequently asked questions about GSM ### What is GSM-RELAY used for? GSM-RELAY is a seven-channel remote control device for industrial control. The application allows you to send SMS messages to the WAFER GSM-RELAY unit to perform remote control and configure parameters. ### Do I need any special hardware to use GSM-RELAY? Yes, this application requires a WAFER GSM-RELAY unit to function. It is not a standalone software solution for remote control. ### How does GSM-RELAY work? The application sends SMS commands to the WAFER GSM-RELAY hardware. These commands are interpreted by the hardware to perform specific actions or change settings on the controlled industrial equipment. ### What platforms does GSM-RELAY support? GSM-RELAY is available for iPhone and iPod devices. ### Is GSM-RELAY free to use? Yes, GSM-RELAY is available for free download. There are no in-app purchases or subscription fees associated with the application itself. ### How often is GSM-RELAY updated? The latest version of GSM-RELAY is 1.8, released on June 24, 2017. The app has not been updated since then. ### What is the user rating for GSM-RELAY? GSM-RELAY has a user rating of 2.3 stars based on 3 ratings. This suggests a mixed to negative user reception. ### Does GSM-RELAY have ads? No, GSM-RELAY does not contain advertisements. The application is ad-free. ## Version history (last 5 releases) ### 1.8 — 2017-06-24 This app has been updated by Apple to display the Apple Watch app icon. fix bug ### 1.7 — 2017-06-06 fix bug ### 1.6 — 2016-07-01 fix bug ### 1.5 — 2016-06-27 Updated App for more devices features and also Now one APP to manage more different gsm controllers from WAFERSTAR ### 1.4 — 2013-11-27 bug fixes ## Apps similar to GSM | App | Rating | Price | Category | | --- | --- | --- | --- | | [Holiday Family Auto Group](https://appshunter.io/ios/app/holiday-family-auto-group/id6448051387) | — | Free | Business | | [ATLAS Config](https://appshunter.io/ios/app/atlas-config/id1634787760) | — | Free | Business | | [Control SITE](https://appshunter.io/ios/app/control-site/id1622228732) | — | Free | Business | | [CROP-i](https://appshunter.io/ios/app/crop-i/id6446583250) | — | Free | Business | | [Supplies On Site](https://appshunter.io/ios/app/supplies-on-site/id6478267203) | — | Free | Business | ## More apps by 艳丽 刘 - [GSMKEY](https://appshunter.io/ios/app/gsmkey/id595251747) - [WIFI-RELAY8](https://appshunter.io/ios/app/wifi-relay8/id657294544) - [GSM-DKEY](https://appshunter.io/ios/app/gsm-dkey/id912114051) - [RTU5015](https://appshunter.io/ios/app/rtu5015/id1100111938) - [RTU5025](https://appshunter.io/ios/app/rtu5025/id1116556204) All apps by 艳丽 刘: https://appshunter.io/developer/595252190 --- *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 2026-06-10.*