I checked the API (with My personal Key) for Houten and saw this:
In the app the values are at the same time of the API Call:
Precipitation today = 0
Precipitation tomorrow = 50
Precipitation overmorgen = 60
I think the prediction precipitation in MM needs to be calculated for 24 hours (per day).
Which could also be a very nice feature: to show an image with the MM Precipitation coming 24 hours (rolling forecast). See how PBTH it does for day ahead energy prices:
{ "liveweer": [{"plaats": "Houten", "timestamp": 1708545483, "time": "21-02-2024 20:58:03", "temp": 9.2, "gtemp": 5.4, "samenv": "Lichte regen", "lv": 96, "windr": "ZZO", "windrgr": 186.1, "windms": 6.1, "windbft": 4, "windknp": 11.9, "windkmh": 22, "luchtd": 1000.62, "ldmmhg": 751, "dauwp": 8.5, "zicht": 5860, "gr": 0, "verw": "Van het westen uit regen. Morgenavond veel wind", "sup": "07:41", "sunder": "18:04", "image": "regen", "alarm": 0, "lkop": "Donderdagavond (zeer) zware windstoten", "ltekst": "Momenteel zijn er geen waarschuwingen. Donderdagavond zijn er (zeer) zware windstoten, landinwaarts tot rond 85 km/u, aan de kust tot rond 105 km/u. De wind komt uit het zuidwesten tot westen.", "wrschklr": "groen"}], "wk_verw":[{"dag":"21-02-2024","image":"bewolkt","max_temp":9,"min_temp":9,"windbft":5,"windkmh":36,"windknp":19,"windms":10,"windrgr":211,"windr":"Z","neersl_perc_dag":0,"zond_perc_dag":0},{"dag":"22-02-2024","image":"buien","max_temp":12,"min_temp":6,"windbft":5,"windkmh":32,"windknp":17,"windms":9,"windrgr":208,"windr":"Z","neersl_perc_dag":50,"zond_perc_dag":19},{"dag":"23-02-2024","image":"halfbewolkt","max_temp":8,"min_temp":4,"windbft":5,"windkmh":28,"windknp":16,"windms":8,"windrgr":204,"windr":"Z","neersl_perc_dag":60,"zond_perc_dag":31},{"dag":"24-02-2024","image":"halfbewolkt","max_temp":7,"min_temp":2,"windbft":5,"windkmh":28,"windknp":16,"windms":8,"windrgr":200,"windr":"Z","neersl_perc_dag":20,"zond_perc_dag":35},{"dag":"25-02-2024","image":"halfbewolkt","max_temp":8,"min_temp":3,"windbft":4,"windkmh":25,"windknp":14,"windms":7,"windrgr":208,"windr":"Z","neersl_perc_dag":60,"zond_perc_dag":32}],"uur_verw":[{"uur":"21-02-2024 21:00","timestamp":1708545600,"image":"regen","temp":9,"windbft":4,"windkmh":25,"windknp":14,"windms":7,"windrgr":195,"windr":"Z","neersl":1,"gr":0},{"uur":"21-02-2024 22:00","timestamp":1708549200,"image":"regen","temp":9,"windbft":4,"windkmh":25,"windknp":14,"windms":7,"windrgr":201,"windr":"Z","neersl":0.9,"gr":0},{"uur":"21-02-2024 23:00","timestamp":1708552800,"image":"regen","temp":9,"windbft":4,"windkmh":21,"windknp":12,"windms":6,"windrgr":208,"windr":"Z","neersl":0.4,"gr":0},{"uur":"22-02-2024 00:00","timestamp":1708556400,"image":"regen","temp":9,"windbft":4,"windkmh":21,"windknp":12,"windms":6,"windrgr":217,"windr":"ZW","neersl":0.1,"gr":0},{"uur":"22-02-2024 01:00","timestamp":1708560000,"image":"regen","temp":9,"windbft":3,"windkmh":18,"windknp":10,"windms":5,"windrgr":229,"windr":"ZW","neersl":0.6,"gr":0},{"uur":"22-02-2024 02:00","timestamp":1708563600,"image":"regen","temp":9,"windbft":3,"windkmh":18,"windknp":10,"windms":5,"windrgr":240,"windr":"ZW","neersl":0.6,"gr":0},{"uur":"22-02-2024 03:00","timestamp":1708567200,"image":"bewolkt","temp":10,"windbft":3,"windkmh":18,"windknp":10,"windms":5,"windrgr":244,"windr":"ZW","neersl":0,"gr":0},{"uur":"22-02-2024 04:00","timestamp":1708570800,"image":"bewolkt","temp":10,"windbft":3,"windkmh":18,"windknp":10,"windms":5,"windrgr":236,"windr":"ZW","neersl":0,"gr":0},{"uur":"22-02-2024 05:00","timestamp":1708574400,"image":"bewolkt","temp":10,"windbft":3,"windkmh":18,"windknp":10,"windms":5,"windrgr":235,"windr":"ZW","neersl":0,"gr":0},{"uur":"22-02-2024 06:00","timestamp":1708578000,"image":"bewolkt","temp":10,"windbft":3,"windkmh":14,"windknp":8,"windms":4,"windrgr":227,"windr":"ZW","neersl":0,"gr":0},{"uur":"22-02-2024 07:00","timestamp":1708581600,"image":"bewolkt","temp":10,"windbft":3,"windkmh":14,"windknp":8,"windms":4,"windrgr":220,"windr":"ZW","neersl":0,"gr":0},{"uur":"22-02-2024 08:00","timestamp":1708585200,"image":"regen","temp":10,"windbft":3,"windkmh":14,"windknp":8,"windms":4,"windrgr":207,"windr":"Z","neersl":0.1,"gr":0},{"uur":"22-02-2024 09:00","timestamp":1708588800,"image":"bewolkt","temp":10,"windbft":3,"windkmh":14,"windknp":8,"windms":4,"windrgr":187,"windr":"Z","neersl":0,"gr":14},{"uur":"22-02-2024 10:00","timestamp":1708592400,"image":"bewolkt","temp":10,"windbft":3,"windkmh":18,"windknp":10,"windms":5,"windrgr":182,"windr":"Z","neersl":0,"gr":75},{"uur":"22-02-2024 11:00","timestamp":1708596000,"image":"bewolkt","temp":11,"windbft":4,"windkmh":21,"windknp":12,"windms":6,"windrgr":174,"windr":"Z","neersl":0,"gr":125},{"uur":"22-02-2024 12:00","timestamp":1708599600,"image":"bewolkt","temp":11,"windbft":4,"windkmh":21,"windknp":12,"windms":6,"windrgr":167,"windr":"ZO","neersl":0,"gr":91},{"uur":"22-02-2024 13:00","timestamp":1708603200,"image":"regen","temp":11,"windbft":4,"windkmh":25,"windknp":14,"windms":7,"windrgr":175,"windr":"Z","neersl":0.1,"gr":22},{"uur":"22-02-2024 14:00","timestamp":1708606800,"image":"regen","temp":11,"windbft":4,"windkmh":21,"windknp":12,"windms":6,"windrgr":192,"windr":"Z","neersl":0.7,"gr":6},{"uur":"22-02-2024 15:00","timestamp":1708610400,"image":"regen","temp":11,"windbft":4,"windkmh":21,"windknp":12,"windms":6,"windrgr":196,"windr":"Z","neersl":0.1,"gr":11},{"uur":"22-02-2024 16:00","timestamp":1708614000,"image":"regen","temp":11,"windbft":4,"windkmh":25,"windknp":14,"windms":7,"windrgr":191,"windr":"Z","neersl":0.1,"gr":44},{"uur":"22-02-2024 17:00","timestamp":1708617600,"image":"regen","temp":11,"windbft":5,"windkmh":28,"windknp":16,"windms":8,"windrgr":189,"windr":"Z","neersl":0.6,"gr":8},{"uur":"22-02-2024 18:00","timestamp":1708621200,"image":"bewolkt","temp":11,"windbft":5,"windkmh":36,"windknp":19,"windms":10,"windrgr":202,"windr":"Z","neersl":0,"gr":8},{"uur":"22-02-2024 19:00","timestamp":1708624800,"image":"regen","temp":10,"windbft":5,"windkmh":36,"windknp":19,"windms":10,"windrgr":215,"windr":"ZW","neersl":1.1,"gr":0},{"uur":"22-02-2024 20:00","timestamp":1708628400,"image":"regen","temp":8,"windbft":5,"windkmh":36,"windknp":19,"windms":10,"windrgr":268,"windr":"W","neersl":0.2,"gr":0}],"api":[{"bron":"Bron: Weerdata KNMI/NOAA via Weerlive.nl","max_verz":300,"rest_verz":299}]}
Update 3.0.7
Under-the-Hood Enhancements: In this version of KNMI, we’ve made some minor improvements to enhance overall performance and user experience. We’re continuously working behind the scenes to fine-tune the app for the best possible user experience. Your feedback is invaluable! If you encounter any issues or have suggestions, feel free to reach out through our support channels.
Enjoy the latest version of KNMI App with small improvements under the hood, ensuring a smoother experience for all users! 
Enjoy a seamless and stable connection with KNMI Homey app! 
Disclaimer 
Next Timestamp, next Date/Time, next Weather Alarm Code Capabilities: Enhanced functionality with new capabilities for next timestamp, date/time, and weather alarm codes.
New Trigger Cards and Tokens for next date/time time and alarm code: Introduced new trigger cards and tokens for expanded automation possibilities.
Extra New Condition Cards for Next Time Weather Alarm Colour Code: Added extra condition cards for next time weather alarm color code for improved visibility and control.
Fixed Weather Alarm Code Color Condition Cards: Addressed a bug in the weather alarm code color condition cards for improved functionality and reliability.
