Hi Felix,
as far as I know, the Samsung Galaxy S4 uses a Sensirion SHTC1 which covers a humidity measurement range from 0 to 100% and a temperature measurement range from -30 to 100 °C with a typical accuracy of ±3% RH and ±0.3 °C and thus meets your requirements.
However, you should keep in mind that the smartphone itself produces heat (e.g. from the cpu/gpu) and you produce heat as well, if you hold it in your hand or keep it in your pocket. Thus, smartphones might need some time to rest before you use them to measure temperature. Personally, I wouldn't use the smartphone itself to measure temperature, because unless you constantly monitor and limit gpu/cpu activity to a minimum, you'll never (really) know how it has affected your values.
Based on my personal experience I can recommend a Galaxy S4 as a "phyphox-phone" in combination with a SensorTag (CC2650). This would give you the possibility to take measurements with both devices at the same time or compare them to one another. Moreover, both devices have the advantage that they are quite popular, so that many used devices may be available and could be purchased at a low price.
Best wishes, Sebastian
as far as I know, the Samsung Galaxy S4 uses a Sensirion SHTC1 which covers a humidity measurement range from 0 to 100% and a temperature measurement range from -30 to 100 °C with a typical accuracy of ±3% RH and ±0.3 °C and thus meets your requirements.
However, you should keep in mind that the smartphone itself produces heat (e.g. from the cpu/gpu) and you produce heat as well, if you hold it in your hand or keep it in your pocket. Thus, smartphones might need some time to rest before you use them to measure temperature. Personally, I wouldn't use the smartphone itself to measure temperature, because unless you constantly monitor and limit gpu/cpu activity to a minimum, you'll never (really) know how it has affected your values.
Based on my personal experience I can recommend a Galaxy S4 as a "phyphox-phone" in combination with a SensorTag (CC2650). This would give you the possibility to take measurements with both devices at the same time or compare them to one another. Moreover, both devices have the advantage that they are quite popular, so that many used devices may be available and could be purchased at a low price.
Best wishes, Sebastian