# \[APP\]\[Pro\] Power by the Hour - your own Energy Management System on Homey: it measures, predicts, plans and controls

**URL:** <https://community.homey.app/t/app-pro-power-by-the-hour-your-own-energy-management-system-on-homey-it-measures-predicts-plans-and-controls/20535>\
**Category:** Apps\
**Tags:** app, tools\
**Created:** [November 10, 2019, 10:06pm UTC](https://community.homey.app/t/app-pro-power-by-the-hour-your-own-energy-management-system-on-homey-it-measures-predicts-plans-and-controls/20535 "2019-11-10T22:06:03Z")\
**Posts on this page:** 1\
**Showing post:** 3969

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**Author:** ![Gruijter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/gruijter/32/1973_2.png) [@Gruijter](https://community.homey.app/u/Gruijter)\
**Post date:** [August 1, 2026, 11:41am UTC](https://community.homey.app/t/app-pro-power-by-the-hour-your-own-energy-management-system-on-homey-it-measures-predicts-plans-and-controls/20535/3969 "2026-08-01T11:41:45Z")

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New version 8.10.1 is ready for testing: [https://homey.app/a/com.gruijter.powerhour/test/](https://homey.app/a/com.gruijter.powerhour/test/)

- Behind the scenes preparations
- Added app-2app pricing api @Menno_De_Braak please test extensively!
- Massive README rewrite

This version opens up the Day Ahead Prices from Power By The Hour to other apps and Homey scripts. For instance the app [Ultimate EMS](https://community.homey.app/t/ultimate-ems-with-zero-export/155475) will be using this to get Day Ahead prices.

Other Homey apps and HomeyScript can query prices or listen for real-time slot pushes via the new PBTH Inter-App API:

- `GET /dap-prices` — fetch all current future price slots (use once during app init)
- Realtime event `dap-prices-updated` — emitted on slot changes and price updates.

See **[README.dap-api.md](https://github.com/gruijter/com.gruijter.powerhour/blob/master/README.dap-api.md)** for full API reference and code examples.

While at it, the PBTH documentation was completely rewritten to describe use cases and how to set that up: [[APP][Pro] Power by the Hour: Insights per hour, day, month and year](https://community.homey.app/t/app-pro-power-by-the-hour-insights-per-hour-day-month-and-year/20535#p-87567-use-case-directory-2)

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_[View the full topic](https://community.homey.app/t/app-pro-power-by-the-hour-your-own-energy-management-system-on-homey-it-measures-predicts-plans-and-controls/20535)._