Comparison

3Sigma mobile CRM vs Pen Book

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

Head to head
About

3Sigma mobile CRM

Features
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Introducing 3Sigma Mobile CRM: Your Ultimate Sales Companion! - **Seamless Lead Synchronization:** Automatically sync leads from 10+ sources like Indiamart, Facebook, and more. - **Instant Communication:** WhatsApp your leads instantly for quick follow-ups. - **Efficient Lead Management:** Enjoy auto-assignment of leads, instant alerts, and daily follow-up reminders. - **Customizable Solutions:** Tailor everything to suit your unique business needs. - **Real-time Insights:** Stay on top with real-time reports for informed decision-making. - **Boost Sales Efficiency:** Increase follow-up rates by 60% and digitize your sales process for up to 50% business growth. - **Universal Applicability:** Perfect for sales, telecalling, lead tracking, and customer record management. - **Global User Base:** Trusted by thousands of businesses worldwide. Say goodbye to scattered leads, manual management, and missed opportunities. With 3Sigma Mobile CRM, streamline your sales process, close more deals, and build stronger customer relationships Our terms of user https://www.3sigmacrm.com/terms-of-use/ Our privacy policy https://www.3sigmacrm.com/privacy/

About

Pen Book

Features
Read full description

Pen Book is a private, all-in-one CRM for sales-driven offices. Manage leads, customers, agents, and employees, verify attendance by GPS, automate follow-up reminders, and track commission โ€” all from one role-based, mobile-first platform. EIGHT MODULES, ONE PLATFORM Lead Management โ€” Capture every prospect, assign them to an agent or employee, and track them through to a closed deal. Filter by status, product, agent, or date, and search by name in seconds. Customer Records โ€” Full policy and KYC details, document and voice attachments, reviewer chains, due-for-renewal filters, and a clean add / edit / convert flow. Agents & Teams โ€” A directory of every field agent and internal employee, with visual reporting trees. Assign new leads to the right person in one tap. Attendance โ€” GPS-verified daily check-in and check-out for employees, with a per-employee monthly summary of present, absent, late, and hours worked for admins. Reminders โ€” Automatic follow-up reminders for assigned leads and customer renewals. One-tap mark-complete keeps the queue clean. Business & Commission โ€” Per-person business totals for the month, with commission auto-calculated by tier. Filter by month or by person, with top performers up top. Products Catalogue โ€” A master list of products and prices. Selecting a product auto-fills the premium on a lead or customer โ€” no double entry. Visitor Log โ€” A public form for anyone visiting the office. Reception sees who came, why, and which staff member is responsible. BUILT FOR EVERY ROLE Admin sees every lead, customer, agent, employee, attendance record, and commission across the business, and configures office settings and reports. Employees work their assigned leads and customers and sign in and out with GPS verification. Agents capture leads in the field, convert them to customers, and track their commission. PRIVACY & SECURITY All connections use TLS 1.3, data at rest is encrypted with AES-256, and access is governed by role-based permissions. Explicit, revocable consent is requested on first launch, and account deletion is available in-app. Pen Book is an internal tool for authorised employees, agents, and administrators.

Screenshots

3Sigma mobile CRM4 screens
Pen Book4 screens

Verdict

The call

The clearest difference is iOS requirement: 3Sigma mobile CRM at 15.1 against Pen Book's 26.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

3Sigma mobile CRM ships an update every 8 days, Pen Book weekly. Both last shipped on October 24, 2026.

Scorecard1 real difference ยท 5 level
3Sigma mobile CRM versus Pen Book: the parameters behind the verdict, then further details
Parameter3Sigma mobile CRMPen Book
PriceFreeFree
Update frequencyEvery 8 daysWeekly โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPod โ€” betteriPhone
Requires iOS15.1 โ€” better26.1
Further details โ€” not scored
Size76 MB8 MB
Age rating17+4+
DeveloperVivek RanaJovaris

In-app purchases

None

3Sigma mobile CRM

No in-app purchases

None

Pen Book

No in-app purchases

Questions

Is 3Sigma mobile CRM free?
3Sigma mobile CRM is free to download, with no in-app purchases.
Is Pen Book free?
Pen Book is free to download, with no in-app purchases.
Do 3Sigma mobile CRM or Pen Book have ads?
Neither 3Sigma mobile CRM nor Pen Book shows ads.
Which is updated more often, 3Sigma mobile CRM or Pen Book?
3Sigma mobile CRM ships an update every 8 days, and Pen Book weekly. Most recently, 3Sigma mobile CRM was updated on October 24, 2026 and Pen Book on October 24, 2026.

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