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Comparison

Second Phone Number Calling vs Build Clock

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

Head to head
Second Phone Number Calling
Second Phone Number Calling

2nd phone number.: Message

Free
💼 Business
★ 4.6649 ratingsView app →
Build Clock
Build Clock

Employee time tracking

Free
💼 Business
No ratingsView app →
About

Second Phone Number Calling

This app provides a private, secondary phone number on your existing device, allowing for unlimited calls and texts without an extra SIM. Protect your primary number from spam and manage work-life balance effectively with flexible calling and messaging features.

Highlights
  • Get verified USA phone numbers
  • Unlimited local and international calls
  • Send SMS and view message history
  • Send FAX worldwide
  • Block undesirable phone numbers
  • Name Number feature for identification
Features
Read full description

Save up to 72% on outbound calls to USA and Canada phone numbers (landlines or mobiles).

 Our service works through WiFi or cellular data (not included).

 Receive calls from any country code (landlines or mobiles). Outbound calls are just for USA and Canada phone numbers (landlines, mobiles or toll-free). Keep your privacy uncompromised, protect your identity, and reduce the risk of spam or harassment on your primary line. Enhance your work-life, balance and organized without an extra SIM or device. Private, Practical, flexible, versatile. Our app is your best extra phone number in your pocket. Don’t buy additional SIM cards with exorbitant bills if you want an extra phone number. We provide an extra phone line through an additional phone number. Take your business phone line with you without an extra device nor extra SIM-card. Buy a verified USA phone number and call with the best rates in the market. Let our service maintain your business communications, and avoid changing the phone number in the future. Protect your personal number to keep in touch with your family and friends. • Send SMS (to USA numbers only) and FAX as easily as ever.

 • Receive SMS (from USA numbers only) • Light and dark mode included. • Keep in touch with customers using your same personal device. • We deliver your calls, texts, and faxes, with outstanding coverage and quality. No more landlines and desk phones. FEATURES: • Get verified extra phone numbers from USA.

 • Save up to 72% on outbound calls to USA and Canada phone numbers (Outbound calls are just for USA and Canada phone numbers: landlines, mobiles or toll-free).

 • Receive calls from any country code (landlines or mobiles). • Send SMS (USA numbers only) and view message history.

 • Receive SMS (from USA numbers only) • Send FAX worldwide. • Access your contacts list from your personal device and synchronize it with the app. • Block undesirable phone numbers. • Add an extra verified USA number with just a few taps and delete it if you don’t need it anymore. • Keep your purchased phone numbers as long as you want. No contracts needed. • Identify your numbers and find them easily using the Name Number feature. * +60 minutes daily for outbound calls to USA and Canada phone numbers only (some carriers and area codes may vary their rates). ** You can switch the phone number included in your subscription for a $5.99 one-time fee; the new phone number will be added to your current subscription. Terms of use: http://second-phone.com/terms Privacy Policy: http://second-phone.com/policy Download and Save!

About

Build Clock

Features
Read full description

Build Clock helps construction teams track time, organize projects, create daily reports, manage cost codes, review payroll-related records, and keep job information in one place. Built for contractors, foremen, and construction businesses, Build Clock makes it easier to record job hours, assign time to projects and cost codes, manage employees, and review field activity from a simple mobile workflow. Features include: - Employee and team management - Project tracking - Time and hours tracking - Daily reports - Cost code organization - Payroll-related summaries - Project calendar - Project reports - Admin tools for business setup Some features require an active Build Clock Pro Monthly subscription. Subscription Information: Build Clock Pro Monthly is an auto-renewable monthly subscription. Payment is charged to your Apple ID at confirmation of purchase. The subscription automatically renews unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription in your Apple ID account settings. Privacy Policy: https://www.buildclockpro.com/privacy/ Terms of Use: https://www.buildclockpro.com/terms/

Screenshots

Second Phone Number Calling4 screens
Build Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: Build Clock at none against Second Phone Number Calling's 8. Build Clock also leads on update cadence (every 5 days vs every 3 weeks). Second Phone Number Calling's advantage is iOS requirement (15.0 vs 18.6). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Second Phone Number Calling sells 8 in-app purchases, starting at $5.99 per 7 days. Build Clock asks for nothing beyond the download.

UpkeepUpdate frequency

Second Phone Number Calling ships an update every 3 weeks, Build Clock every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Second Phone Number Calling versus Build Clock: the parameters behind the verdict, then further details
ParameterSecond Phone Number CallingBuild Clock
PriceFreeFree
Rating4.6 (649 ratings) — better—
Positive reviews94.0% of reviews—
Number of ratings649 — better—
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better18.6
Further details — not scored
Size68 MB5 MB
Age rating4+4+
DeveloperSecond Phone Number & Texting LLCCody Rust

Bugs and requests

Second Phone Number Calling

Reported bugs

3 issues
  • Login and account management problems
  • Inconsistent call quality in low signal areas
  • Billing and subscription issues

Requested features

4 requests
  • Improved call blocking and spam filtering
  • Integration with popular messaging apps
  • Expanded number selection options
  • Enhanced voicemail and call forwarding features

Build Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Second Phone Number Calling

Subscriptions7
  • Pick your phone number$5.997 Days
  • 1 Phone Number$7.997 Days
  • 1 phone number$9.991 Month
Show 4 more
  • 1 phone number$14.991 Month
  • 3 phone numbers$27.991 Month
  • 3 phone numbers$74.991 Year
  • 3 phone numbers$119.991 Year
One-time1
  • New Phone Number$5.99
None

Build Clock

No in-app purchases

Questions

Is Second Phone Number Calling free?
Second Phone Number Calling is free to download, with in-app purchases available.
Is Build Clock free?
Build Clock is free to download, with no in-app purchases.
Do Second Phone Number Calling or Build Clock have ads?
Neither Second Phone Number Calling nor Build Clock shows ads.
Which is updated more often, Second Phone Number Calling or Build Clock?
Second Phone Number Calling ships an update every 3 weeks, and Build Clock every 5 days. Most recently, Second Phone Number Calling was updated on November 3, 2026 and Build Clock on October 31, 2026.

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