Hola Magdalena, the dictionary Laura & I use most is https://www.linguee.com/ and this is also available as an app. It’s a really good service. Free app that is available offline too. Really accurate translations and lots of other languages available. https://www.wordreference.com/ is another useful one. As physical books we have had the Oxford and the Collins Spanish-English dictionaries. Both are very good. The mini dictionaries are handy for having with you all the time, so might recommend one of those, as long as you can read the small type! Saludos, Adam
