LoopString vs Tilt Hydrometer
The Tilt logs gravity and temperature. LoopString reads the same signals and actively controls fermentation.
Pick the Tilt if…
- You want the simplest possible one-time-cost gravity + temperature logger.
- You're monitoring one or two fermenters and don't need active control.
- You prefer no subscription at all and a tiny, self-contained device.
- You just want a number in an app or spreadsheet, not a control system.
Pick LoopString if…
- You want to actively control fermentation temperature (glycol / heat belt) with on-edge PID.
- You want every batch and tank on one browser dashboard with alerts and recipes.
- You need HACCP / FDA-style PDF compliance reports + an audit log for the team.
- You want a free tier to start and a platform that grows from one fermenter to a cellar.
| Feature | LoopStringYou | Tilt Hydrometer |
|---|---|---|
| Hardware | ||
| Floating in-fermenter gravity + temperature sensor | ||
| One-time hardware purchase, no subscription required | ||
| Bring-your-own Raspberry Pi + commodity sensors | ||
| iSpindel / wireless hydrometer gravity sensing | ||
| Connectivity | ||
| Bluetooth to phone / tablet | ||
| WiFi logging | ||
| Control | ||
| Active fermentation temperature control (PID) | ||
| Drives glycol valves / heat belts / pumps | ||
| Recipe / multi-phase batch automation | ||
| Monitoring | ||
| Gravity + temperature logging | ||
| Log to spreadsheet / cloud endpoint | ||
| Multi-batch / multi-tank dashboard | ||
| Alerts | ||
| Threshold + escalation alerts | ||
| Compliance | ||
| HACCP / FDA-style PDF reports built-in | ||
| Audit-grade activity log | ||
| Collaboration | ||
| Team dashboard with role-based access | ||
| Pricing | ||
| Free tier for 1 device | ||
| Flat per-device monthly pricing (platform) | ||
The Tilt comparison covers the Tilt / Tilt Pro hydrometer line and the official Tilt Pico WiFi adapter. LoopString reads gravity from an iSpindel; both are wireless floating hydrometers. Capabilities and pricing vary by model.
Why fermenters move from logging to LoopString
The Tilt logs; LoopString controls
The Tilt is a brilliant, simple thing: a floating hydrometer that reports gravity and temperature. But it only logs — it doesn't act. LoopString reads a gravity sensor (an iSpindel does the same job) and then drives the fermentation: PID temperature control on a glycol valve or heat belt, hysteresis on a pump, recipes that step through fermentation phases. Monitoring is the start, not the finish.
One dashboard for every batch and tank
The Tilt app is great for one or two fermenters on a phone. LoopString is a browser dashboard built for a cellar: every batch and tank in one place, multi-tank grouping, presence indicators for who's looking, and public share links. No app store, no per-device app juggling.
Alerts, compliance, and a team
LoopString adds threshold and escalation alerts (text the cellar lead when a fermenter drifts), HACCP / FDA-style PDF compliance reports, a tamper-resistant audit log, and role-based access for the crew. The Tilt gives you the data; LoopString turns it into an operation you can run as a team and document for an inspector.
Keep your Tilt — add the platform
You don't have to choose. Keep using a Tilt where it works and run LoopString as the control + dashboard + compliance layer with an iSpindel (or your existing gravity readings) feeding it. The Tilt's one-time-cost, no-subscription model is a real strength for hobby and single-batch use; LoopString is the platform for when fermentation becomes a process you control and document.
Key Takeaways
- The Tilt is a floating Bluetooth (and WiFi via Tilt Pico) hydrometer that logs gravity + temperature — monitoring only, no control.
- LoopString reads the same signals from an iSpindel and then actively controls fermentation: PID temperature, pumps, recipes.
- One browser dashboard for every batch and tank, with alerts, HACCP / FDA-style PDF reports, audit log and team RBAC.
- Keep your Tilt — its one-time, no-subscription cost is a real strength; LoopString is the control + compliance platform on top.
- Free tier for one device, flat per-device monthly pricing thereafter.
Frequently Asked Questions
- Does LoopString replace the Tilt Hydrometer?
- For the gravity-and-temperature logging the Tilt does, LoopString reads the same signals from an iSpindel (a wireless floating hydrometer) over MQTT. The bigger difference is that LoopString then controls fermentation — temperature loops, pumps, recipes — and adds dashboards, alerts and compliance. The Tilt is monitoring-only; LoopString is monitoring plus active control.
- Does the Tilt do WiFi, or only Bluetooth?
- Both. The standard Tilt is Bluetooth to a phone/tablet, and Tilt offers an official WiFi path via the Tilt Pico adapter (and you can also bridge a classic Tilt through a Raspberry Pi). So the Tilt isn't Bluetooth-only — but in every case it's still logging, not controlling.
- Is LoopString more expensive than a Tilt?
- Different model. A Tilt is roughly a $135 one-time purchase with no required subscription — excellent value for monitoring one fermenter. LoopString is a platform: a free tier for one device, then flat per-device monthly pricing, on top of a Pi + sensors you buy once. You pay for the control, dashboards, alerts and compliance the Tilt doesn't do.
- Can I use my existing Tilt with LoopString?
- LoopString's first-class gravity sensor is the iSpindel, which it reads natively over MQTT. If you already log Tilt data to a cloud endpoint or spreadsheet you can keep that running alongside; for control loops driven by gravity, point LoopString at an iSpindel in the same fermenter.
- What does LoopString control that a Tilt setup needs add-ons for?
- Fermentation temperature is the big one: LoopString drives a glycol solenoid or heat belt with an on-edge PID loop, so the wort holds its target through ambient swings and internet outages. It also runs pumps, multi-phase recipes (e.g. ramp for a diacetyl rest), and threshold alerts — all from the same dashboard.
Other comparisons
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