# What does OnTimer use?

OnTimer (ontimer.app) shows public evidence of 9 tools, according to runsonwhat (last checked 2026-10-09).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | DNS records |  |
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS records, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code |  |
| [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code |  |
| [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code |  |
| [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Email records, Website code |  |

## FAQ

### What tools does OnTimer use?

As of October 2026, runsonwhat has found 9 tools at OnTimer (ontimer.app) in public records. Edge & Hosting: Google Cloud and Vercel. Application: React, Tailwind CSS and Next.js. Data & Observability: Google Analytics and Sentry. Company Ops: Mailgun. Last checked October 9, 2026.

### What cloud does OnTimer run on?

OnTimer uses Google Cloud for hosting and cloud infrastructure, alongside Vercel, according to runsonwhat (October 2026). runsonwhat found Google Cloud through DNS records that point at Google Cloud. Google Cloud is used by 74,972 companies runsonwhat tracks.

### What analytics tools does OnTimer use?

OnTimer uses Google Analytics for analytics, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on ontimer.app. Google Analytics is used by 849,922 companies runsonwhat tracks.

### What monitoring tools does OnTimer use?

OnTimer uses Sentry for monitoring, according to runsonwhat (October 2026). runsonwhat found Sentry through Sentry code on ontimer.app. Sentry is used by 76,864 companies runsonwhat tracks.

### Does OnTimer use React?

Yes. runsonwhat found React at OnTimer through React code on ontimer.app. React is a Frontend tool used by 124,024 companies runsonwhat tracks.

### How does runsonwhat know what OnTimer uses?

runsonwhat reads public records only. Of the 9 tools at OnTimer, 5 were found through code on ontimer.app, 2 through DNS records, 1 through email records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and ontimer.app about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/ontimer.app (updated October 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.