GSM+ Second Phone Number vs LinOTP Authenticator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GSM+ Second Phone Number
Obtain multiple virtual phone numbers from over 40 countries without needing an extra SIM card. Use these numbers for calls, texts, and registrations to protect your personal number's privacy. Enjoy affordable international communication and manage your lines easily.
- Multiple virtual phone numbers
- Supports 40+ countries
- No extra SIM card needed
- Make calls and send SMS/MMS
- Call recording
- Voicemail creation
- Call forwarding
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Cheap Calls for Business and Personal Use Anywhere, Anytime LOOKING FOR A SEPARATE NUMBER FOR PRIVATE COMMUNICATIONS? GSM+ gives you access to multiple phone lines in 40+ countries for business and personal use, all without needing an extra SIM card. Choose a custom number to make calls, send SMS and MMS, and protect the privacy of your real number. Forget the hassle of buying and swapping SIM cards for different numbers. With GSM+, switching between numbers for calls is quick and effortless! Maintain your international number for as long as you desire, and replenish your GSM+ balance with more minutes and SMS. Enjoy making international calls and texts from a different number at the most affordable rates. Calls worldwide are easy and economical with our in-app currency system. GSM+ is perfect for various scenarios, providing additional numbers to use instead of your real phone number: • Online Marketplaces: Safely post ads and communicate using a temporary number. • Dating: Share an alternative number from GSM+ for new connections, ensuring your privacy. • Business Communications: Use GSM+ as a secondary work number to separate professional and personal calls. • Property Rentals and Car Hiring: Remain anonymous and secure by providing a GSM+ number for public services. • Registrations: Sign up for platforms requiring a phone number, including messengers and social networks, without revealing your personal number. Share your actual phone number only with trusted contacts. For all other purposes, GSM+ is your go-to solution! If you wish, you can keep the application away from curious eyes with a PIN code. Other features of the application; - Number blocking. - Ability to disable incoming calls. - Ability to create Voicemail. - Call forwarding. - Ability to turn on/off recordings. - Ability to stop receiving SMS. - Automatic reply to SMS messages. - Ability to turn on/off notifications. - Credit calculation page. - Transaction history page. - SmsActivate alternative. -------------------- About subscriptions: After starting the subscription, the credit amount of the package you selected will be automatically added into your account during each renewal period. Unused credits will not be carried over to the next subscription term. Subscription period is (one) 1 month. In every period, your subscription renews for the amount of the package you selected. Payment will be charged to your iTunes account during confirmation of purchase. Subscriptions 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 the cost of the renewal will be identified as well. Subscriptions may be managed by the user and auto-renewal may be turned off in the user's Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://gsmplus.app/docs/privacy.php , Terms Of Use: https://gsmplus.app/docs/tos.php
LinOTP Authenticator
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Use LinOTP Authenticator to secure your accounts with two-step authentication by generating verification codes to access your accounts. Two-step authentication provides an extra level of security for your accounts because every new verification code generated by LinOTP Authenticator is uniquely valid for a single sign in request only. LinOTP Authenticator is compatible with most of your accounts already as it supports standard TOTP and HOTP security algorithms. However, it works best with LinOTP, the enterprise-level 2FA solution. See https://linotp.de for more information. Features: * Generate verification codes offline * Edit your verification accounts * LinOTP Authenticator works with most providers and accounts * Biometric app lock * Simple QR code setup Permission notice: Camera: LinOTP Authenticator will ask you for the camera permission if you want to add accounts using the QR code scanner functionality.Use LinOTP Authenticator to secure your accounts with two-step authentication
Screenshots
Verdict
The clearest difference is in-app purchases: LinOTP Authenticator at none against GSM+ Second Phone Number's 21. LinOTP Authenticator also leads on iOS requirement (13.0 vs 15.0). GSM+ Second Phone Number's advantage is update cadence (every 3 weeks vs every 8 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. GSM+ Second Phone Number sells 20 in-app purchases, starting at $3.99 per month. LinOTP Authenticator asks for nothing beyond the download.
GSM+ Second Phone Number ships an update every 3 weeks, LinOTP Authenticator every 8 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | GSM+ Second Phone Number | LinOTP Authenticator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (758 ratings) — better | — |
| Positive reviews | 37.3% of reviews | — |
| Number of ratings | 758 — better | — |
| Update frequency | Every 3 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 111 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Mobile Victory | KeyIdentity GmbH |
Bugs and requests
GSM+ Second Phone Number
Reported bugs
2 issues- Credits deducted without service
- Numbers becoming inactive quickly
Requested features
2 requests- Add support for more countries
- Improve customer support
LinOTP Authenticator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
GSM+ Second Phone Number
- Credits Tariff #1$3.991 Month
- Credits Tariff #3$7.991 Month
- Credits Tariff #4$9.991 Month
Show 11 moreShow fewer
- Canada - Dual Functionality$9.991 Month
- US - (Call+SMS)$9.991 Month
- GB - (Call+SMS)$9.991 Month
- US- Dual Functionality$14.991 Month
- Canada - Dual Functionality$14.991 Month
- UK - Dual Functionality$14.991 Month
- Auto Credit Tariff #5$19.991 Month
- Puerto Rico-Dual Functionality$24.991 Month
- Auto Credit Tariff #6$29.991 Month
- Australia - Dual Functionality$39.991 Month
- GB - (Call+SMS)$59.991 Year
- Phone number purchase$0.99
- Phone number purchase$3.99
- Phone number purchase$9.99
Show 3 moreShow fewer
- Phone number purchase$19.99
- Phone number purchase$39.99
- Phone number purchase$69.99
LinOTP Authenticator
No in-app purchases
Questions
Is GSM+ Second Phone Number free?
Is LinOTP Authenticator free?
Do GSM+ Second Phone Number or LinOTP Authenticator have ads?
Which is updated more often, GSM+ Second Phone Number or LinOTP Authenticator?
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