The lack of a wallet seems like a ridiculous reason for such a price drop. Something else must be at play...
The only equihash coin with a
dedicated,
branded Android wallet that works flawlessly is BTCZ:
https://play.google.com/store/apps/details?id=com.btczcom.btcz&hl=enEquihash coins will be the clear winner due to GPU support, no ASIS and privacy. SO I am not even looking at no-equihash coins as they are mostly ASIC'd up, (now even including Cryptonight) and centralized in China.
In terms of wallets, I'm not going to wait for the day to hear Freewallet, Coinami etc got "hacked". I like dedicated, non centralized wallets where my private keys are with me.