Black Mirror

The Cell Phone combines the PDA with a Magic/Ice Mirror - and the PDA is thirteen info accessories deep: watch, depth meter, compass, radar, lifeform analyzer, tally counter, metal detector, stopwatch, DPS meter, fisherman's pocket guide, weather radio and sextant, assembled through intermediate gadgets at the Tinkerer's Workshop. The fishing trio comes from Angler rewards (Good Little Slave chain), the Metal Detector from the Nymph (Deceiver of Fools), the rest from chests, drops and the Travelling Merchant. A proper collection quest - tick the components off in the crafting tree, then enjoy never wondering what time it is again. The seaside upgrade is Sea You Later.