I have some experience using Tandem! I mostly practiced through text and only used the audio messaging feature a few times. It's been many years since I last used it but I would still reccomend it especially since you didn't have a positive experience with HelloTalk. I'd say to try out Tandem to see how you like it.
I found that I liked using the Slowly app to practice writing. It takes time to get a letter back form someone but it encourages longer messages. I believe Slowly has an audio message feature too.
To improve my speaking I mostly talk to myself but I understand that having a conversation is more effective. Another reccomendation would be teachers on iTalki. You can find a teacher that does conversational classes so you can imrpvoe your speaking.
I have some experience using Tandem! I mostly practiced through text and only used the audio messaging feature a few times. It's been many years since I last used it but I would still reccomend it especially since you didn't have a positive experience with HelloTalk. I'd say to try out Tandem to see how you like it.
I found that I liked using the Slowly app to practice writing. It takes time to get a letter back form someone but it encourages longer messages. I believe Slowly has an audio message feature too.
To improve my speaking I mostly talk to myself but I understand that having a conversation is more effective. Another reccomendation would be teachers on iTalki. You can find a teacher that does conversational classes so you can imrpvoe your speaking.
I hope I could help!