That's like the worst choice imho. Sentinel is hardly maintained by Samourai and has many bugs, often times adresses aren't updated, or even show wrong balances. I would go for a simple view only wallet on either bluewallet or just mempool.space and bookmark the individual adresses of that wallet (if there aren't that many of course).
Just the simplest option. Electrum for Android may support watch-only but I am not sure.
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