Stonex STX-AG400

Paid#42 of 51 in Precision Agriculture Software

Stonex STX-AG400: A focused Android guidance system with RTK positioning and broad ISOBUS support. Ranked #42 of 51 in Precision Agriculture Software by our editors (4.4/10); pricing: Pricing on request; best for operators needing RTK auto-steering and ISOBUS support.

4.4/10Editor score

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Stonex STX-AG4004.4 Contact Stonex

At a glance

Editor score
4.4 / 10
Pricing
Pricing on request
Best for
Operators needing RTK auto-steering and ISOBUS support
Machine guidance
Yes
Facts checked
14 Nov 2026

Where it wins
- RTK positioning with stated accuracy of ±2.5 cm
- Supports AB, curved, pivot, headland and other route patterns
- ISOBUS UT, TC-SC, TC-GEO, TC-BAS and AUX support
Where it doesn't
- Focused on guidance rather than a broad farm-management suite
- Android-only software
- Pricing is available by request

Our verdict on Stonex STX-AG400

Stonex STX-AG400 is a GNSS guidance and auto-steering system for agricultural machinery, including tractors, transplanters, sprayers and harvesters. It is aimed at operators who need machine guidance, field management and implement-control support. The Android software offers automatic steering as well as AG400 Lite visual manual guidance, with tractor and implement configuration and calibration for precision-farming tasks.

For guidance work, STX-AG400 supports creation and management of guidance lines and field boundaries, with AB, A+, curved, pivot, mixed, headland and diagonal route patterns. Its stated RTK positioning accuracy is ±2.5 cm. Basic and Smart U-turn functions are included. Together, these options suit operations that need multiple route types and repeatable machine guidance, rather than a general-purpose farm platform. The product is listed for cloud and mobile deployment, while its software platform is Android.

ISOBUS support is a notable fit for operators coordinating guidance with compatible implement-control functions: the listed protocols are UT, TC-SC, TC-GEO, TC-BAS and AUX. Stonex offers email and phone support, and pricing is available by request. The focused feature set and Android platform make STX-AG400 a candidate for farms prioritizing auto-steering, field boundaries and ISOBUS capability. Buyers seeking broader farm-management functions or software beyond Android should compare alternatives before choosing it.

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Stonex STX-AG400 pricing

Plans Pricing on requestPaid No free plan — trial or paid only. Prices checked 14 Nov 2026.

See plans on stonex.it

Stonex STX-AG400 fact sheet

Free plan	Not verified
Paid from	Not verified
Machine guidance	Yes
Variable-rate application	Not verified
Field mapping	Yes
Equipment telemetry	Not verified
Managed acres	Not verified
Mobile app	Yes
API access	Not verified
Deployment	Cloud, Mobile
Platforms	Android
Support	Email, Phone
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Integrations	5 integrations: ISOBUS UT, TC-SC, TC-GEO, TC-BAS, AUX
Pricing	Pricing on request
Website	stonex.it
Facts checked	14 Nov 2026

Stonex STX-AG400 integrations

Stonex STX-AG400 lists 5 integrations on its own site.

ISOBUS UT
TC-SC
TC-GEO
TC-BAS
AUX

Alternatives to Stonex STX-AG400

See all Stonex STX-AG400 alternatives →

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Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

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Last updated 15 Nov 2026 · How we research and update