Comparison

OnSIP vs Keap Mobile

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

Head to head
About

OnSIP

This app extends your business phone system to your mobile device, enabling HD voice and video calls, contact monitoring, and voicemail management. Stay connected with clients and colleagues from anywhere, without needing extra hardware.

Highlights
  • HD voice and video calls
  • Voicemail management
  • Contact availability monitoring
  • Call history
  • Remote work connectivity
Features
Read full description

OnSIP brings your business phone to you, whether you're at the office, at a client's site, or working remotely. Connect with customers, partners, vendors, and coworkers from your OnSIP account on your iPhone. With OnSIP, you can take advantage of standard business phone features without the additional hardware. Make and receive HD voice and video calls, monitor contact availability, check recent call history, and manage your voicemail in one simple interface.

About

Keap Mobile

Manage customer information, tasks, and notes from anywhere. This app provides mobile access to your CRM, helping you stay organized and make a great impression. It includes features like a business card scanner, appointment scheduling, and payment processing.

Highlights
  • Add/access customer info, tasks, and notes
  • Mobile reminders and alerts
  • Business card scanner
  • Contact import
  • Appointment scheduler
  • Accept payments
  • Business line features (caller ID, auto-replies)
Features
Read full description

Your Keap CRM, available on the go! Our mobile app for Keap lets users add or access customer info, tasks, and notes on-the-go, keeping you prepared and ensuring you make a winning impression with customers. Mobile reminders and alerts prevent you from missing important to-do's. Stay organized with Keap CRM with built in marketing and sales automation. You can view customer details, notes, tasks, call history, messages, and more in one organized contact record so you don’t get caught without the info you need prior to a meeting or business call. ----------------------------------------- CRM features: • Business card scanner: Scan business cards, which will be automatically transcribed and added as a contact in Keap phone call app. • Easy contact import: Import your business contacts directly from your real phone number. • Appointment scheduler (For users of Keap Lite, Keap Pro, Keap Max editions only): View your appointments or book appointments directly through the phone call app so you can manage your business line on the go • Accept payments: View, edit, create and send invoices allowing you to request payment on the go. ----------------------------------------- Keap Business Line Features (For users of Keap Pro and Keap Max editions in the U.S. and Canada only): • Displays caller ID so you always know if the call is meant for your personal or business line. Use the Keap phone number caller ID to quickly see if the call is from your business line so you can answer your sideline number like a pro every time. • Works as a personalized real phone number generator to easily create or change a virtual number to exactly what you want. Choose your own local number or change phone numbers to a customized number like 555-4MY-HOME so it's memorable for your small business and your clients. It’s a second phone number generator with you in charge. • Auto replies when you’re away. SMS and call forwarding auto-replies when you miss a text or call on your business line so you never miss out on following up with a lead or an important client. • Let's you set your business schedule. Set a snooze schedule to pause business line calls and SMS notifications while sideline auto-replies for you to stay connected to your leads while you focus on other things that matter. • Allows for customization of your business line voicemail. Set up custom voicemail greetings so your second phone number for your business line is specific to your business. Plus, voicemails are automatically transcribed to help you save time and respond quicker.

Screenshots

OnSIP4 screens
Keap Mobile4 screens

Verdict

The call

The clearest difference is rating: Keap Mobile at 4.4 against OnSIP's 2.4. Keap Mobile also leads on review sentiment (28% vs 9%) and ratings volume (1.8K vs 67). OnSIP's advantage is in-app purchases (none vs 10). On price, update cadence, 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. Keap Mobile sells 10 in-app purchases, starting at $9.99 per month. OnSIP asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Keap Mobile holds the better App Store score, 4.4 against 2.4. That said, the two scores are not equally well evidenced: Keap Mobile has 1.8K ratings behind it against 67, so its average is the more settled of the two. Written reviews point the same way: 9% of OnSIP's written reviews are positive against 28% of Keap Mobile's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 15, 2026 and September 25, 2026 respectively.

Scorecard6 real differences · 4 level
OnSIP versus Keap Mobile: the parameters behind the verdict, then further details
ParameterOnSIPKeap Mobile
PriceFreeFree
Rating2.4 (67 ratings)4.4 (1.8K ratings) — better
Positive reviews8.7% of reviews28.2% of reviews — better
Number of ratings671.8K — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.415.1 — better
Further details — not scored
Size26 MB108 MB
Age rating4+17+
DeveloperOnSIPInfusionsoft

Customer experience

OnSIP

All ratings67 ratings
Positive28.4%
Neutral6.0%
Negative65.7%
Written reviews23 reviews
Positive8.7%
Neutral8.7%
Negative82.6%

Keap Mobile

All ratings1,824 ratings
Positive83.1%
Neutral4.8%
Negative12.2%
Written reviews131 reviews
Positive28.2%
Neutral6.9%
Negative64.9%

Bugs and requests

OnSIP

Not enough reviews yet to summarise bugs or requests.

Keap Mobile

Reported bugs

3 issues
  • Contacts not syncing properly
  • Text messaging issues and unreliable notifications
  • Overlapping UI elements and unresponsive buttons

Requested features

4 requests
  • Ability to port existing phone numbers
  • More customization options
  • Improved calendar and scheduling features
  • Better email integration

In-app purchases

None

OnSIP

No in-app purchases

10 purchases

Keap Mobile

Subscriptions10
  • Keap Mobile7 Days trial$9.991 Month
  • Keap Mobile$9.991 Month
  • Keap Mobile7 Days trial$14.991 Month
Show 7 more
  • Keap Mobile$14.991 Month
  • Keap Mobile7 Days trial$19.991 Month
  • Keap Mobile$19.991 Month
  • Keap Mobile$49.996 Months
  • Keap Mobile Semi-Annual Plan7 Days trial$79.996 Months
  • Keap Mobile Annual Plan$99.991 Year
  • Keap Mobile Annual Plan7 Days trial$149.991 Year

Questions

Is OnSIP free?
OnSIP is free to download, with no in-app purchases.
Is Keap Mobile free?
Keap Mobile is free to download, with in-app purchases available.
Which has better reviews, OnSIP or Keap Mobile?
Keap Mobile is rated higher. OnSIP averages 2.4 out of 5 from 67 ratings, while Keap Mobile averages 4.4 from 1.8K ratings.
Do OnSIP or Keap Mobile have ads?
Neither OnSIP nor Keap Mobile shows ads.
Which is updated more often, OnSIP or Keap Mobile?
OnSIP ships an update every 2 months, and Keap Mobile every 2 months. Most recently, OnSIP was updated on September 15, 2026 and Keap Mobile on September 25, 2026.

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