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Case studies

Solutions built on real projects — management software, WhatsApp agents, automations. explained by the problem they solve.

20 guides in this category

Integration scheme between management software and n8n with webhook, signature and processing nodesIntegrate business software with n8n: APIs, webhooks and HMAC signingConnect business software to n8n: webhooks, API calls, HMAC signing and endpoint protection. Checks before designing automation.
Fleet Expiry: Insurance, Stamp, Review and Cutting with Status LevelsFleet deadlines: insurance, road tax, inspections and servicingTrack fleet insurance, road tax, inspections and servicing: urgency levels, mileage thresholds and a dashboard showing what to do today.
WhatsApp Cloud API schema: template, 24-hour window, delivery and message statusWhatsApp Cloud API: how it works and how much it really costsHow WhatsApp Cloud API works: the 24-hour window, templates, media and delivery statuses. Actual costs and why to avoid unofficial methods.
Secure access to a management system: password, two-factor code, session and trial limitsMandatory 2FA for business software: why and how to implement itWhy business software holding customer data needs a second factor, how to move beyond an open demo, and what a security test finds.
Match between fine and driver: plate, instant of infringement, contract and customerAutomatically match traffic fines to driversMatch number plates and infringement times to rental contracts to identify drivers, handling tolerances, gaps in booking records and uncertain cases.
WhatsApp agent scheme for short rentals: reservation, rules, message and delivery statusWhatsApp agent for short-term rentals: the full case studyHow we automated check-in for 17 short-term rental apartments using a WhatsApp agent, n8n and a custom PWA. Architecture, costs and real mistakes.
Check-in automation scheme for short rentals: reservation, date, instructions and remindersAutomated check-in for short-term rentals: how it worksHow to automate check-in for short-term rentals: which messages send automatically, how to choose the right time and what to leave to a person.
Digital contract flow: data, generated document, signature and storageContracts and digital signature in the app: how it really worksGenerate a contract from existing system data, sign it on screen at delivery and archive the PDF, including driving authorisation for the driver.
CRM scheme for car rental: fleet, contracts, deadlines and related customersCustom CRM for car rental: the full case studyCustom CRM for luxury car rental: traffic fine reading, fleet deadlines, quotes, in-app signatures and profitability per vehicle. A real case study.
Comparison of custom-made CRM and ready-made management software: costs, time and controlCustom CRM or off-the-shelf business software: how to chooseWhen to build a custom CRM or buy off-the-shelf business software: two deciding questions, real costs and the risk of vendor lock-in.
Documents of vehicles in digital: booklet, coupons, vehicle card and searchDigital vehicle documents: registration, servicing and vehicle recordsOrganise vehicle registration documents, service records and certificates in each vehicle's record instead of a shared folder, keeping data beside its source.
Six errors of a WhatsApp automation: duplicates, firm queue, webhooks and silent failuresWhatsApp automation: 6 mistakes we learned from in practiceSix real failures in a production WhatsApp automation: silent errors, duplicate nodes, blocked queues and open webhooks. What breaks and how to avoid it.
Automatic reading of a report in PDF: text, OCR and extracted fieldsRead PDF traffic fines automatically: text, OCR and limitationsExtract a vehicle registration number, date and amount from a PDF fine notice: text reading, OCR, field validation and what to do when the system is uncertain.
Language choice in automatic messages: prefix, template, language and fallbackMultilingual Automatic Messages: How to Choose the Right LanguageChoose the right language for automated messages using phone country codes, booking channels or stated preferences. Advantages and drawbacks.
Web push notifications operation: permission, delivery service, notification and deviceWeb Push Notifications: How They Work and Limits on iPhoneHow web push notifications work, why permission should be requested during a user action and which limits apply on iPhone. A practical guide.
Flow of the automatic payment of the tourist tax: guest, calculation of the amount, link and collectionAutomatic payment of the tourist tax with StripeCollect tourist tax before arrival: calculate the amount, generate a payment link on demand and track receipts. A real case involving 17 apartments.
Automatic quote from free text: message, date, distance and final PDFAutomatic quotes from a free text messageTurn an unstructured message into a quote: extract dates and locations, calculate using a distance table and generate a PDF ready to send.
Comparison of custom-made enterprise PWAs and ready-to-run software: control, cost and maintenanceCustom business PWA: when it makes sense over off-the-shelf softwareWhen to build a custom business PWA and when to buy off-the-shelf software: costs, data control and maintenance. A real case.
Profitability by vehicle: revenue, real costs, margin and fleet decisionProfitability per vehicle: see which vehicles earn moneyCalculate each vehicle's real margin using rental revenue and actual costs: insurance, road tax, maintenance, tyres and extraordinary expenses.
Iter of approval of a WhatsApp Business template: draft, revision, approval and sendingWhatsApp Business templates: get approval from MetaWrite WhatsApp Business templates that Meta approves at first review: categories, variables, common reasons for rejection and language management.

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