We architect and deploy custom smart contracts that power your core business logic, from tokenomics to governance. Our development process is built on security-first principles, utilizing OpenZeppelin libraries and comprehensive audit workflows to mitigate risk.
LABS
Services
Private Mobile Subscription Payment System
We build secure, privacy-preserving infrastructure for mobile app subscriptions. Payment status and history are verifiable off-chain or via private smart contracts, protecting user consumption data from exposure.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
- Token Systems:
ERC-20,ERC-721,ERC-1155with custom minting, vesting, and tax logic. - DeFi Protocols: Automated market makers (AMMs), staking pools, yield aggregators, and lending vaults.
- Enterprise Logic: Multi-signature wallets, DAO governance modules, and compliant asset issuance frameworks.
- Full Audit Trail: Every contract undergoes internal review, static analysis, and formal verification before mainnet deployment.
We deliver battle-tested code with 99.9%+ reliability SLAs, reducing your time-to-market from months to weeks. Our contracts are optimized for gas efficiency and designed for seamless future upgrades.
key-features-cards
ARCHITECTURE & SECURITY
Core Technical Capabilities
We engineer private mobile payment systems with enterprise-grade security and compliance, enabling you to launch a compliant, scalable subscription service in weeks, not months.
01
Private Smart Contract Architecture
Deploy custom ERC-20/ERC-721 subscription contracts with privacy-preserving logic. Our architecture uses zero-knowledge proofs and secure multi-party computation to shield transaction details while maintaining full auditability for compliance teams.
100%
On-Chain Privacy
< 2 sec
Proof Generation
02
Mobile-First Wallet Integration
Seamless SDKs for iOS and Android that abstract blockchain complexity. We handle key management, gas sponsorship, and transaction batching, delivering a native mobile experience with <1 second payment confirmation.
< 1 sec
Payment UX
0 Gas
For End-Users
03
Regulatory Compliance Engine
Built-in compliance modules for AML/KYC checks, transaction monitoring, and regional licensing logic (e.g., MTL, VASP). Automatically enforce geo-blocking and sanction screening without compromising user privacy.
Automated
Sanction Screening
Jurisdiction
Rule Engine
04
High-Availability Node Infrastructure
Dedicated, load-balanced RPC endpoints with 99.9% uptime SLA. We manage node failover, archival data, and real-time indexing for subscription events, ensuring your service never misses a payment cycle.
99.9%
Uptime SLA
< 100ms
API Latency
05
Real-Time Analytics & Webhooks
Monitor subscription lifecycles, churn rates, and revenue in real-time. Get instant webhook notifications for payment successes, failures, and renewals to sync with your existing CRM and billing systems.
Real-Time
Revenue Dashboard
< 500ms
Webhook Delivery
06
Security Audits & Penetration Testing
Every system undergoes rigorous audits following OpenZeppelin standards and independent penetration testing. We provide verifiable audit reports from firms like Trail of Bits or Quantstamp to build trust with your users and regulators.
Certified
By Trail of Bits
Zero Critical
Vulnerabilities
benefits
DELIVERED BY CHAINSCORE
Business Outcomes for Your Mobile App
Integrate a secure, compliant, and user-friendly subscription payment system to directly enhance your mobile app's revenue, retention, and growth.
01
Seamless On-Chain Payments
Enable users to pay for subscriptions directly from their self-custody wallets (e.g., MetaMask, Rainbow) with a single click. No credit card forms, no bank details, just instant, borderless crypto payments.
< 2 sec
Payment Confirmation
0%
Chargeback Risk
02
Automated Recurring Billing
Implement reliable, automated subscription renewals using secure, audited smart contracts. Set flexible billing cycles (monthly, quarterly, annually) with guaranteed execution and immutable payment records.
99.9%
Renewal Success SLA
24/7
Automated Execution
03
Enhanced User Retention & LTV
Reduce churn with frictionless payments and transparent billing. Offer token-gated perks, loyalty rewards, and easy upgrade/downgrade flows directly within your app's native experience.
40%+
Lower Churn (Typical)
3x
Higher LTV Potential
05
Real-Time Analytics & Insights
Gain full visibility into your subscription business with dashboards tracking MRR, churn rate, active subscribers, and revenue by token. Make data-driven decisions with Web3-native analytics.
Real-Time
Revenue Dashboards
ERC-20, 721
Multi-Token Support
06
Rapid Integration & Scalability
Leverage our modular SDKs and APIs for iOS & Android. Go live in weeks, not months, with a system designed to scale from startup to enterprise, handling millions of transactions.
< 3 weeks
Typical Integration
99.95%
Platform Uptime SLA
Structured Delivery for Mobile Payment Systems
Phased Development Packages
Compare our modular development packages designed to get your private mobile subscription payment system from concept to production with predictable scope and cost.
| Feature / Deliverable | Foundation | Production | Enterprise |
|---|---|---|---|
Smart Contract Suite (ERC-20, ERC-721, Payment Router) | |||
On-Chain Subscription Logic & Billing Engine | |||
Mobile SDK (iOS & Android) for Wallet Integration | |||
Admin Dashboard for User & Revenue Management | |||
Smart Contract Security Audit (2 Rounds) | Basic Review | Full Audit + Report | Full Audit + Formal Verification |
Multi-Chain Deployment Support | 1 EVM Chain | Up to 3 EVM Chains | Custom (Any EVM/L2) |
Integration Support | Documentation Only | 8 Hours | Dedicated Engineer |
Post-Launch Monitoring & Alerting | 30 Days | 6 Months | 12 Months SLA |
Estimated Timeline | 4-6 Weeks | 8-12 Weeks | Custom |
Starting Price | $25,000 | $75,000 | Custom Quote |
how-we-deliver
PROVEN FRAMEWORK
Our Delivery Methodology
We deliver secure, scalable mobile payment systems through a structured, transparent process designed for fintech compliance and rapid market entry.
01
Discovery & Architecture Design
We conduct a technical deep-dive to define your tokenomics, regulatory requirements, and integration points with existing mobile infrastructure. This phase establishes the technical blueprint and security model.
2-3 days
Workshop Duration
100%
Requirements Locked
02
Smart Contract & Backend Development
Our engineers build the core payment logic using audited Solidity standards and a secure, scalable backend (Node.js/Python) for subscription management, billing cycles, and user wallets.
4-6 weeks
Development Sprint
OpenZeppelin
Security Foundation
03
Security Audit & Penetration Testing
Every contract and API undergoes rigorous internal review followed by a formal audit from a third-party security firm. We provide a detailed vulnerability report and remediation plan.
Certik
Audit Partner
100%
Critical Issues Resolved
04
Staging Deployment & Integration
We deploy the complete system to a staging environment for end-to-end testing. This includes integration with mobile SDKs, payment gateways, and simulating real-world subscription flows.
Testnet
Initial Deployment
< 1 week
Integration Window
05
Production Launch & Monitoring
We manage the mainnet deployment with zero-downtime strategies and establish 24/7 monitoring for transaction success rates, gas optimization, and system health.
99.9%
Uptime SLA
< 5 min
Incident Response
06
Ongoing Support & Scaling
Post-launch, we provide dedicated support, performance optimization, and feature upgrades to handle user growth and new payment methods. Includes analytics dashboards.
24/7
Developer Support
10k+ TPS
Scalability Target
Private Mobile Payment System
Frequently Asked Questions
Get clear answers about our end-to-end service for building secure, compliant mobile subscription payment systems on blockchain.
It's a blockchain-based infrastructure that enables businesses to process recurring payments (like monthly subscriptions) directly from users' mobile wallets. Unlike public on-chain transactions, it uses zero-knowledge proofs and private smart contracts to keep payment amounts, subscriber identities, and business logic confidential, while maintaining an immutable audit trail on-chain. This provides the automation of smart contracts with the privacy of traditional payment rails.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall