Quick Take
Shopping for marine electronics sonar navigation usually comes down to how you fish. The four units here split into castable handhelds and display-equipped fish finders. Prices run from $32.99 for the LUCKY Portable Fish Finder to $359.00 for the Humminbird 698ci HD SI Combo, with the Helix 5 Chirp GPS G3 and Deeper Smart Sonar PRO+ 2 sitting in between. If you want a display in front of you, the Helix 5 is the lower-priced unit with GPS and CHIRP. If side imaging matters, the 698ci is the one unit that includes side imaging alongside down imaging and internal GPS. If you want to cast the transducer rather than mount it, the Deeper PRO+ 2 works with a phone, and the LUCKY gives you a simple LCD display without the higher price.
Price at a Glance
| Fish Finder | Listed Price | Price Bar | What You Get |
|---|---|---|---|
| LUCKY Portable Fish Finder | USD 32.99 | Handheld LCD, castable transducer | |
| Humminbird Helix 5 Chirp GPS G3 | USD 160.00 | 5-inch CHIRP/GPS display, Wi-Fi | |
| Deeper Smart Sonar PRO+ 2 | USD 199.00 | Castable Wi-Fi sonar, built-in GPS | |
| Humminbird 698ci HD SI Combo | USD 359.00 | Side/down imaging, internal GPS |
Decision Matrix
Choose the LUCKY when you want the lowest price and a handheld LCD sonar with a castable transducer; the unit is used, so that is part of the trade-off.
Choose the Helix 5 Chirp GPS G3 when you want a 5-inch color display, CHIRP sonar, GPS, and Wi-Fi at $160.
Choose the Deeper PRO+ 2 when you want castable sonar with built-in GPS, triple beam, and Wi-Fi, and you are comfortable using the Fish Deeper app as the display.
Choose the Humminbird 698ci when you want side imaging and down imaging with internal GPS and UniMap cartography; it sits at the top of this price range.
Product Notes
LUCKY Portable Fish Finder - Handheld Sonar, LCD Display, Castable Transducer Cm

At $32.99, this is the least expensive entry point. The LUCKY is a handheld sonar with an LCD display and a castable transducer, in a yellow plastic body that runs on batteries. That combination makes it easy to carry on outdoor fishing trips and gives you a direct sonar view without needing a phone. The main trade-off is condition: this unit is used, so the price reflects pre-owned gear rather than a fresh retail package. If you only need a simple castable sonar and you are comfortable with used equipment, this is the quickest way into the category.
Humminbird Helix 5 Chirp GPS G3 Fish Finder (411660-1) Brand New In Box NVR OPN

At $160, the Helix 5 brings a 5-inch 800 x 480 color display, CHIRP sonar, GPS, and Wi-Fi into one package. The condition is Brand New In Box and never opened, which gives it a cleaner starting point than the used LUCKY unit. The power source is electric corded, so it depends on the boat's power supply rather than a built-in rechargeable battery. For a shopper who wants a full sonar and GPS display without moving to the top of the price range, this is the option to weigh against the 698ci.
Deeper Smart Sonar PRO+ 2 GPS WiFi Castable Fish Finder DP5H10S10 NEW

At $199, the Deeper Smart Sonar PRO+ 2 is the casting option in this group. It offers built-in GPS for bathymetric mapping, triple beam sonar, Wi-Fi, and compatibility with the Fish Deeper app. Casting range and scanning depth are both 330 ft / 100 m, and the unit is described for fresh water, salt water, shore, kayak, boat, and ice fishing. The reason to choose it is mobility: you can toss the transducer where you need it and keep your phone as the interface. The trade-off is that the app becomes your display, so your phone has to be with you while you fish.
Humminbird 698ci Fish Finder Transducer HD SI Combo Side Imaging Sonar GPS

At $359, the 698ci HD SI Combo is at the top of the price range and is the one to look at if side imaging is a priority. It combines side imaging and down imaging sonar with an internal GPS chartplotter, UniMap cartography, a 5-inch 256-color display, and 4000W PTP power output. The package includes the transducer, mounting brackets, and connection cables, and the design allows drop-in replacement capability. The limitation is the combination of price and condition: it is described as New other (see details), with shelf wear on the box even though the unit is described as never used.
Final Recommendation
Match the fish finder to the way you fish. For a shopper on the tightest budget who wants a castable handheld, the LUCKY Portable Fish Finder at $32.99 is the straightforward fit. If you want a display with GPS and CHIRP without going to the top price, the Humminbird Helix 5 Chirp GPS G3 at $160 is the one to start with. If you prefer casting sonar in front of you and using your phone as the screen, the Deeper Smart Sonar PRO+ 2 at $199 pairs Wi-Fi and built-in GPS with a 330-foot casting range. And if side imaging is a must, the Humminbird 698ci HD SI Combo at $359 brings side imaging, down imaging, and internal GPS together in one package.