Yard Force NX100i vs Gardena SILENO life

Quick take: The Gardena SILENO life costs $84 less; the Yard Force NX100i is rated for a larger lawn (14,520 sq ft); the Yard Force NX100i is rated for steeper ground (40%); the Yard Force NX100i cuts taller (up to 2.9"), which matters for fescue and warm-season grasses.

SpecYard Force NX100iGardena SILENO life
Price~$799~$715
Rating——
NavigationBoundary WireBoundary Wire
Max Lawn Size14,520 sq ft (14,520 sq ft)8,100 sq ft (8,100 sq ft)
Max Slope40% (22°)35% (19°)
Cutting Width7"8.7"
Cut Height1.3"–2.9"0.8"–2"
DriveRWDRWD
Runtime90 min65 min
Charge Time—60 min
Noise—58 dB
Weight—18.3 lb
Obstacle DetectioniRadar active ultrasonic sensors on the nose detect furniture, pets and toys ahead and steer around them; bumper, lift and tilt sensors back them up and a rain sensor sends it to dock.Bumper collision sensors plus lift and tilt stops; no camera, radar or ultrasonic on the base unit (Gardena sells an add-on anti-collision radar separately).
Edge CuttingNoNo
Rain SensorYesNo
CellularNoNo
Anti-TheftPIN code lock with lift and tilt alarm; no GPS trackingPIN code and alarm
Warranty2-year limited2-year limited

Pros & cons

Yard Force NX100i

  • ✓Ultrasonic sensors avoid pets and patio furniture before contact, rare under $1,000
  • ✓$799 with Home Depot and Lowe's availability, so returns and parts are local
  • ✓Rain sensor, lift and tilt cutouts and PIN lock all included
  • ✓CloudHawk app handles scheduling and cut height without touching the mower
  • ✗7 in deck and random pattern mean a full 1/3 acre can take two days to finish
  • ✗2.9 in maximum height is too low for lawns kept at 3 in or more
  • ✗No GPS, mapping or cellular, so theft recovery is a PIN and an alarm

Gardena SILENO life

  • ✓8.7 in deck cuts wider than the 6.3 in city and minimo and clears 8,100 sq ft on a 65-minute cycle
  • ✓58 dB and mows in rain, so it can run on any schedule without bothering neighbors
  • ✓Guide wire with CorridorCut makes narrow passages and outlying areas reliable
  • ✓PIN plus alarm is a step up from the city and minimo
  • ✓About $715 undercuts most wired mowers with this coverage
  • ✗2.0 in maximum cut height is too short for cool-season grass
  • ✗Bluetooth-only app: no remote start, stuck alerts or GPS tracking
  • ✗Bumper-only obstacle handling unless you buy the add-on radar
  • ✗Legacy model on Gardena's site; the 1000 size is no longer priced in the US
  • ✗No edge-cutting mode, so trimming along walls is still on you