Comparison

Second Phone Number vs Shamir Safe

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Second Phone Number

Obtain a secondary phone number for calls and texts without needing an extra SIM card. Use it for personal or professional purposes, including online marketplaces, dating, and business, while keeping your primary number private. Make affordable international calls and send SMS/MMS with this virtual line.

Highlights
  • Obtain a secondary phone number
  • Make calls and send texts
  • No additional SIM card needed
  • Maintain privacy
  • Affordable international calls
  • Send SMS/MMS
Features
Read full description

Get a virtual US or Canadian phone number in minutes! No extra SIM card or second phone needed. Choose a California, Texas, Florida, New York, Illinois, or another available area code. Call and text from your virtual number over Wi-Fi or mobile data. Call mobile and landline numbers in the US, Canada, and 200+ countries worldwide. Send and receive SMS, and share photos and image through MMS. A SEPARATE NUMBER FOR EVERYDAY COMMUNICATION - Keep your personal and business communication organized with a separate US or Canadian phone number. Perfect for: - Work and business communication; - Customers and clients; - Travel and international communication; - Friends and family; - Personal and business calls and messages. FEATURES - A US or Canadian virtual phone number; - A choice of available local area codes; - Wi-Fi calling; - Calls to mobile and landline numbers; - International calls to supported destinations; - SMS and MMS in the US and Canada; - Photo sharing through MMS; - Contact sync. An active subscription is required to get and use a virtual phone number. Calling and messaging availability may vary by destination and carrier. - Terms of Use: https://sphone.telecom.municorn.com/privacy?app=second-phone - Privacy Policy: https://sphone.telecom.municorn.com/terms?app=second-phone - CCPA: https://telecom.municorn.com/ccpa?app=second-phone - Privacy Supplement: https://telecom.municorn.com/privacy-supplement?app=second-phone - Messaging Policy: https://sphone.telecom.municorn.com/messaging-policy?app=second-phone

About

Shamir Safe

Features
Read full description

Shamir Safe: Protect Your Crypto with Secret Sharing Secure your cryptocurrency wallets using Shamir's Secret Sharing (SSS) — the same cryptographic standard used by banks and security professionals. Split your seed phrase, private keys, or any sensitive data into multiple encrypted shares. No single share reveals your secret. HOW IT WORKS: Shamir's Secret Sharing splits your secret into N shares, requiring only K shares to reconstruct it (K-of-N threshold). Example: • Split seed into 5 shares • Require 3 shares to recover • Distribute shares to trusted locations • Lose 2 shares? Still recover your secret! KEY FEATURES: Secret Sharing (SSS) • Split seed phrases, private keys, passwords • Custom threshold (K-of-N) • Supports BIP39 mnemonics • Any text up to 2000 characters Secure Storage • No internet required (offline-first) Share Management • Create unlimited shares • Label shares for organization Recovery Tools • Visual share counter • Threshold indicator • Step-by-step reconstruction • Validation before saving Privacy First • Zero data collection • No analytics, no tracking • Open-source cryptography • Works completely offline PERFECT FOR: • Crypto investors securing seed phrases • Multi-sig wallet backup strategies • Estate planning for digital assets • Teams sharing sensitive credentials • Anyone needing secure secret distribution USE CASES: 1. Personal Backup: - Create 3 shares, require 2 - Store: phone, laptop, safety deposit box - Lose one device? Still recover! 2. Family Inheritance: - Create 5 shares for family members - Require 3 of 5 to access - Ensures access if something happens 3. Team Security: - Split company wallet seed - Require 3 of 5 executives - Prevents single point of failure WHY SHAMIR SAFE? Better than paper backup: - No single point of failure - Distributed security - Threshold recovery Better than password manager: - Mathematical security - No master password to forget - Offline by design Better than hardware wallet alone: - Geographic distribution - Survives device loss - No vendor lock-in IMPORTANT SECURITY NOTES: 1. Never share all shares in one location 2. Test recovery BEFORE deleting original 3. Store shares in geographically separate places 4. Shamir Safe cannot recover lost shares 5. You are responsible for share security PRIVACY: Shamir Safe collects ZERO data: • No analytics • No tracking • No personal information • No internet connection required • Your secrets stay on your device

Screenshots

Second Phone Number4 screens
Shamir Safe4 screens

Verdict

The call

The clearest difference is in-app purchases: Shamir Safe at none against Second Phone Number's 10. Shamir Safe also leads on device support (3 vs 1) and iOS requirement (15.5 vs 18.0). Second Phone Number's advantage is ads (none vs shown) and chart position (#139 vs unranked). On price and update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Second Phone Number sells 10 in-app purchases, starting at $9.99 per 7 days. Shamir Safe asks for nothing beyond the download.

UpkeepUpdate frequency

Second Phone Number ships an update fortnightly, Shamir Safe every 10 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 6 level
Second Phone Number versus Shamir Safe: the parameters behind the verdict, then further details
ParameterSecond Phone NumberShamir Safe
PriceFreeFree
Rating4.3 (923 ratings) — better—
Positive reviews64.0% of reviews—
Number of ratings923 — better—
Update frequencyFortnightlyEvery 10 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#139 — better—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.015.5 — better
Further details — not scored
Size126 MB22 MB
Age rating4+4+
DeveloperMunicorn LimitedSerhii Sereda

Bugs and requests

Second Phone Number

Reported bugs

3 issues
  • Inability to send/receive messages or make calls
  • Crashes when trying to link contacts
  • Verification codes not being delivered

Requested features

4 requests
  • Ability to change phone numbers more frequently
  • Support for more social media and messaging apps
  • Option to delete text message history
  • Local phone number availability for international users

Shamir Safe

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Second Phone Number

Subscriptions8
  • Second Phone Premium (week)7 Days trial$9.997 Days
  • Second Phone Premium (week)$9.997 Days
  • Second Phone Premium (week)$14.997 Days
Show 5 more
  • Second Phone Number: Call Text$14.997 Days
  • Monthly Trial3 Days trial$29.991 Month
  • Second Phone Premium (month)$29.991 Month
  • Second Phone Premium (quarter)$49.993 Months
  • Second Phone Premium (yearly)3 Days trial$95.991 Year
One-time2
  • Change number$4.99
  • Change Number 2+$7.99
None

Shamir Safe

No in-app purchases

Questions

Is Second Phone Number free?
Second Phone Number is free to download, with in-app purchases available.
Is Shamir Safe free?
Shamir Safe is free to download, with no in-app purchases.
Do Second Phone Number or Shamir Safe have ads?
Shamir Safe shows ads; Second Phone Number does not.
Which is updated more often, Second Phone Number or Shamir Safe?
Second Phone Number ships an update fortnightly, and Shamir Safe every 10 days. Most recently, Second Phone Number was updated on November 3, 2026 and Shamir Safe on October 31, 2026.

Other comparisons