Track iOS app sizes with trend alerts using Google Sheets and Gmail notifications

IPA Size Tracker with Trend Alerts – Automated iOS Apps Size Monitoring

This workflow runs on a daily schedule and monitors IPA file sizes from configured URLs. It stores historical size data in Google Sheets, compares current vs. previous builds and sends email alerts only when significant size changes occur (default: ±10%). A DRY_RUN toggle allows safe testing before real notifications go out.

Who’s it for

• iOS developers tracking app binary size growth over time.
• DevOps teams monitoring build artifacts and deployment sizes.
• Product managers ensuring app size budgets remain acceptable.
• QA teams detecting unexpected size changes in release builds.
• Mobile app teams optimizing user experience by keeping apps lightweight.

How it works

1. Schedule Trigger (daily at 09:00 UTC) kicks off the workflow.
2. Configuration: Define monitored apps with {name, version, build, ipa_url}.
3. HTTP Request downloads the IPA file from its URL.
4. Size Calculation: Compute file sizes in bytes, KB, MB and attach timestamp metadata.
5. Google Sheets: Append size data to the IPA Size History sheet.
6. Trend Analysis: Compare current vs. previous build sizes.
7. Alert Logic: Evaluate thresholds (>10% increase or >10% decrease).
8. Email Notification: Send formatted alerts with comparisons and trend indicators.
9. Rate Limit: Space out notifications to avoid spamming recipients.

How to set up

1. Spreadsheet

Create a Google Sheet with a tab named IPA Size History containing:

Date, Timestamp, App_Name, Version, Build_Number, Size_Bytes, Size_KB, Size_MB, IPA_URL

2. Credentials

• Google Sheets (OAuth) → for reading/writing size history.
• Gmail → for sending alert emails (use App Password if 2FA is enabled).

3. Open “Set: Configuration” node

Define your workflow variables:

• APP_CONFIGS = array of monitored apps ({name, version, build, ipa_url})
• SPREADSHEET_ID = Google Sheet ID
• SHEET_NAME = IPA Size History
• SMTP_FROM = sender email (e.g., [email protected])
• ALERT_RECIPIENTS = comma-separated emails
• SIZE_INCREASE_THRESHOLD = 0.10 (10%)
• SIZE_DECREASE_THRESHOLD = 0.10 (10%)
• LARGE_APP_WARNING = 300 (MB)
• SCHEDULE_TIME = 09:00
• TIMEZONE = UTC
• DRY_RUN = false (set true to test without sending emails)

4. File Hosting

• Host IPA files on Google Drive, Dropbox or a web server.
• Ensure direct download URLs are used (not preview links).

5. Activate the workflow

Once configured, it will run automatically at the scheduled time.

Requirements

• Google Sheet with the IPA Size History tab.
• Accessible IPA file URLs.
• SMTP / gmail account (Gmail recommended).
• n8n (cloud or self-hosted) with Google Sheets + Email nodes.
• Sufficient local storage for IPA file downloads.

How to customize the workflow

• Multiple apps: Add more configs to APP_CONFIGS.
• Thresholds: Adjust SIZE_INCREASE_THRESHOLD / SIZE_DECREASE_THRESHOLD.
• Notification templates: Customize subject/body with variables: {{app_name}}, {{current_size}}, {{previous_size}}, {{change_percent}}, {{trend_status}}.
• Schedule: Change Cron from daily to hourly, weekly, etc.
• Large app warnings: Adjust LARGE_APP_WARNING.
• Trend analysis: Extend beyond one build (7-day, 30-day averages).
• Storage backend: Swap Google Sheets for CSV, DB or S3.

Add-ons to level up

• Slack Notifications: Add Slack webhook alerts with emojis & formatting.
• Size History Charts: Generate trend graphs with Chart.js or Google Charts API.
• Environment separation: Monitor dev/staging/prod builds separately.
• Regression detection: Statistical anomaly checks.
• Build metadata: Log bundle ID, SDK versions, architectures.
• Archive management: Auto-clean old records to save space.
• Dashboards: Connect to Grafana, DataDog or custom BI.
• CI/CD triggers: Integrate with pipelines via webhook trigger.

Common Troubleshooting

• No size data → check URLs return binary IPA (not HTML error).
• Download failures → confirm hosting permissions & direct links.
• Missing alerts → ensure thresholds & prior history exist.
• Google Sheets errors → check sheet/tab names & OAuth credentials.
• Email issues → validate SMTP credentials, spam folder, sender reputation.
• Large file timeouts → raise HTTP timeout for >100MB files.
• Trend errors → make sure at least 2 builds exist.
• No runs → confirm workflow is active and timezone is correct.

Need Help?

If you’d like this to customize this workflow to suit your app development process, then simply reach out to us here and we’ll help you customize the template to your exact use case.