Case Study
CheckCheck App
How We Turned a Cold, Inherited List into $2,000/Day in Additional Revenue with a Unified Lifecycle System
Perry, CEO - CheckCheck LLC
“We inherited a list and a tech stack that we didn’t fully trust. They helped us rebuild from the ground up—unifying email, SMS, and push, fixing deliverability, and turning ‘cold’ contacts into paying users. The extra revenue from flows alone more than justifies the partnership. Our lifecycle system finally feels like an engine, not a guess.”
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Location
USA
Industry
SaaS
Result
$2,000/Day in Additional Revenue with a Unified Lifecycle System
Overview
GetCheckCheck is a verification app that helps users confirm the authenticity of luxury products. Customers upload photos of items like designer bags, shoes, and accessories, and GetCheckCheck’s experts validate whether the product is real or fake.
When the current owners bought the business, they also inherited its entire customer list—tens of thousands of contacts who had never been consistently emailed or engaged.
At the same time, their messaging ecosystem was fragmented:
- Push notifications were going out via OneSignal
- Email campaigns were managed through Klaviyo
- And the “unengaged” contacts were essentially dormant
We helped GetCheckCheck unify their lifecycle marketing, rebuild their deliverability, and turn a cold, inherited list into a high-performing revenue engine.
Result:
Email deliverability increased from 10% to 61% in 30 days,
and we generated roughly $2,000/day in additional revenue—purely from lifecycle email, SMS, and push.
The Challenge
GetCheckCheck’s new owners faced three main issues:
1. Cold, Underutilized Contact List
The list they acquired had potential but almost no history of consistent communication. Many contacts hadn’t heard from the brand in ages—or at all.
2. Fragmented Messaging Stack
Push notifications were managed through OneSignal, while email lived in Klaviyo. There was no unified view of customer journeys or behavior across channels.
3. Poor Email Deliverability
Deliverability was extremely low—around 10%. That meant even when emails were sent, the majority of customers never saw them.
They didn’t just need “better campaigns.”
They needed a single, coherent lifecycle system that could:
- Reach old contacts safely
- Rebuild trust with inbox providers
- Coordinate email, SMS, and push into one strategy
- Turn engagement into repeat revenue
What We Did
We approached GetCheckCheck’s situation as a full lifecycle + deliverability rebuild.
1. Unified Messaging Under Klaviyo
The first step was consolidating their ecosystem:
- Brought email and key lifecycle logic fully into Klaviyo
- Simplified how events, flows, and customer data were handled
- Reduced fragmentation between email and push strategies
- Ensured Klaviyo became the “brain” of their lifecycle marketing
OneSignal remained relevant for some push use cases, but Klaviyo became the central hub for lifecycle orchestration.
2. Re-Engaged a Cold, Inherited List
We treated the acquired contact list like a cold audience and carefully designed a re-engagement strategy:
- Re-engagement campaigns built as cold-style emails, but with brand context
- Gradual ramp-up to avoid reputation damage
- Segment-based targeting to identify responsive vs. unresponsive groups
- Clear value-driven messaging around authenticity, trust, and protection against fakes
The goal: wake up the list, not burn it.
Those who showed engagement were brought fully into the Klaviyo funnel for ongoing communication.
3. Built Core Lifecycle Flows in Klaviyo
Once deliverability and re-engagement started to improve, we built out the essential lifecycle structure:
- Welcome Flow
For new and reactivated users, introducing the brand, trust signals, how GetCheckCheck works, and key benefits.
- Abandoned Cart Flow
For customers who started but didn’t complete a verification or purchase.
- Post-Purchase Flow
Focused on education, repeat checks, referrals, and ongoing trust-building.
- Upsell / Cross-Sell Flows
Introducing additional services, multi-item checks, or higher-tier offerings.
These flows turned GetCheckCheck’s app into a relationship, not just a one-time transaction.
4. Expanded Beyond Email: SMS & Push Coordination
We supported the rollout of a multi-channel lifecycle system:
- Used Klaviyo (and its integrations) to streamline email + SMS
- Aligned push notifications with lifecycle steps rather than sending them in isolation
- Ensured timing, messaging, and value were consistent across all channels
Together, email, SMS, and push started working as a coordinated engagement system instead of disconnected touchpoints.
5. Empowered Their Team with Tools & Templates
We didn’t just build flows—we also:
- Designed email templates for the GetCheckCheck team to use and adapt
- Provided tools and frameworks for creating future campaigns
- Ensured branding, layout, and messaging were consistent and easy to replicate
This allowed the team to move faster without sacrificing performance or design.
The Solution (The System We Built)
By the end of the core implementation, GetCheckCheck had:
- A unified lifecycle system with Klaviyo at the center
- Re-engagement logic for dormant and inherited contacts
- A set of high-performing flows: welcome, abandoned cart, post-purchase, upsell
- Coordinated email + SMS + push journeys
- Templates and tools that made ongoing campaign creation easier and more effective
- A deliverability framework that could scale with growth
This wasn’t just “better campaigns”—it was a complete lifecycle engine.
The Results
The impact was fast and measurable.
📬 Deliverability: From 10% to 61% in 30 Days
Within just one month:
- Email deliverability increased from around 10% to 61%
- More customers actually saw the messages being sent
- Engagement metrics (opens, clicks, sessions) rose accordingly
Good strategy is meaningless if no one sees the emails.
Fixing deliverability changed the game.
💰 ~$2,000/Day in Additional Revenue
With the new flows and improved deliverability:
- The lifecycle system started generating around $2,000/day in additional revenue
- This came on top of their existing baseline
- Much of this uplift was driven by flows, not just one-off campaigns
For a digital product/app business, this represented a significant, reliable revenue layer built purely from lifecycle and retention.
📈 Ongoing Growth & Legacy Lifecycle System
This project didn’t end after the first 30 days.
We continue to work with GetCheckCheck to:
- Refine flows and segmentation
- Test new lifecycle strategies
- Expand multi-channel orchestration
- Build what we call a legacy lifecycle engagement system—a structure that can support the brand for years, not just quarters.
Conclusion
GetCheckCheck had:
- A powerful, trusted app
- A newly acquired contact list
- Fragmented messaging
- And serious deliverability issues
By unifying their system under Klaviyo, re-engaging dormant contacts through carefully structured campaigns, rebuilding deliverability, and scaling multi-channel flows, we turned a cold, underused asset into:
- 61% deliverability (up from 10%) in 30 days
- $2,000/day in added revenue
- A scalable lifecycle machine that continues to grow with the brand
For GetCheckCheck, lifecycle marketing is no longer an afterthought—it’s a core driver of ongoing revenue and engagement.
Want results like this?
If you're looking to:
Migrate competitor users
Activate old or cold lists
Achieve inbox placement at scale
Build a reliable, high-volume user acquisition engine
Grow daily signups without ads
We can help you replicate this exact system.
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