Choose RAPT Pill if its direct Wi-Fi logging fits your setup; choose a standard Tilt if you can keep a Bluetooth receiver near the fermenter. That is a workflow choice, not an accuracy verdict. Before buying either floating hydrometer, check how readings will reach your log with the fermenter in its usual location and the chamber door closed.
This comparison covers the standard Tilt described in its FAQ and the RAPT Pill KL20596 manual. Tilt Pro, Pro Mini and other models need their own specification checks. We reviewed the manufacturer documents on 11 October 2026; we have not conducted a physical comparison.
RAPT Pill vs Tilt at a glance
| Feature | Standard Tilt | RAPT Pill |
|---|---|---|
| Connection | Bluetooth to a nearby receiver. | Wi-Fi to the RAPT portal, or Bluetooth through compatible RAPT equipment. |
| Cloud setup | The phone/tablet method needs a powered device nearby with the Tilt app open in the foreground. Tilt Pi is another documented option. | A RAPT account, device registration and a 2.4 GHz Wi-Fi network. The cited manual does not support 5 GHz. |
| Updates | The FAQ separates five-second broadcasts from 15-minute Google Sheets updates through the app. | The manual recommends a 60-minute Wi-Fi interval, with a 15-minute minimum. Shorter intervals reduce battery life. |
| Battery | A replaceable CR123A battery. | A rechargeable battery with USB-C charging. |
These details come from the Tilt FAQ and KegLand’s RAPT Pill manual (pages 6–8). Check your current firmware before relying on an interval or integration.
Which setup suits your brew space?
- No spare receiver: consider the Pill’s Wi-Fi route. First establish whether your network reaches the actual fermenter location; a strong signal beside the router is not a useful comparison.
- A receiver already beside the fermenter: consider the Tilt workflow. Include keeping that receiver powered and available in your plan.
- Existing RAPT equipment: check the exact controller model. The Pill manual limits Bluetooth operation to compatible RAPT devices and requires Wi-Fi registration first.
- A specific brewing app is essential: check that app’s current support for your exact device, connection method and subscription. Brand compatibility alone does not establish that your preferred logging route works.
Tilt warns that stainless-steel fermenters reduce Bluetooth range. Test reception with your normal vessel and chamber arrangement before committing a batch to unattended logging. A successful connection in an open room does not answer that question.
Accuracy: what the documents do and do not establish
Tilt specifies ±0.002 SG accuracy over 0.990–1.120 and notes that dissolved-CO₂ bubbles can temporarily raise readings when the device enters active fermentation. This is a manufacturer specification, not a result from our testing. We have not established equivalent accuracy for the two products.
A smooth graph and an accurate final gravity are different checks. Our recommendation is to investigate an unexpected plateau or jump with a separate, appropriately checked sample reading. A logging gap could otherwise be mistaken for a stable fermentation. See how to check final gravity with a hydrometer or refractometer for the reference-method decision. A graph alone should not be treated as packaging clearance.
A practical acceptance checklist
- Before the batch: record device model, firmware, calibration method, receiver and logging destination. For the Pill, follow the manual’s leak test before sanitation and use.
- Check the complete data path: confirm that new timestamps arrive in the intended log with the equipment in position. Record the expected interval so missing data is visible.
- During fermentation: annotate transfers, temperature changes and interruptions. Keep the raw observations rather than smoothing away every unusual point.
- At the end: compare the trend with a checked reference reading and record disagreements. One batch is a troubleshooting exercise, not proof of either product’s universal accuracy.
Keep this record in Beer Lab. For a conventional glass hydrometer, the temperature correction calculator may help when its calibration assumptions match your instrument; do not apply a glass-hydrometer correction automatically to a digital floating device.
Compare the complete cost
Ask for a current local quote including delivery, taxes, any receiver or controller, replacement parts and the software plan you intend to use. We have not verified a current delivered price or a universal cheapest option. The better purchase is the setup you can keep connected, maintain and check.
Learning check: the graph stopped changing. Is fermentation finished?
First check whether timestamps are still advancing. A stale log is not evidence of stable gravity. Then confirm the fermentation record with an appropriate reference measurement.