Is spike cheaper than Signos?

Yes. Signos plans typically run in the $100 to $200 per month range including sensors. spike is $129.99 a year (or $19.99 a month) with a free trial on top of a sensor you buy yourself, like Dexcom Stelo at about $89/month, so the total is meaningfully lower and there's no plan commitment.

What is the difference between spike and Signos?

Signos is a weight-loss program that uses CGM data to time eating and activity nudges, with sensors bundled into a subscription. spike is a general-purpose CGM companion: it shows the exact glucose response to every meal you log (baseline, peak, rise, recovery) so you learn your own food triggers. Signos optimizes for a goal; spike explains your body.

Can I use spike for weight loss?

spike is a wellness app, not a weight-loss program, but the insight it provides (which foods spike you, which keep you steady) is exactly the input many people use to adjust what they eat. You see measured cause and effect for your own meals and make your own choices, ideally with your care team if you have a medical condition.

Do spike and Signos use the same sensors?

Both work with Dexcom hardware. Signos bundles sensors into its plans; spike reads any CGM that writes to Apple Health, including Stelo, Dexcom G6/G7, FreeStyle Libre, and Lingo, purchased wherever you like.

Blog · July 5, 2026 · 5 min read

spike vs Signos: weight-loss program or per-meal glucose answers?

Signos and spike both put a CGM at the center of the experience, then point it at different targets. Signos wants to move your weight. spike wants to explain your meals. Which one you should pay for depends entirely on which sentence sounds like you.

What Signos is

Signos is a subscription weight-loss program built on Dexcom sensors. The app watches your glucose in near real time and nudges you: take a walk now to blunt this spike, consider eating earlier, log your weight. Plans bundle the sensors and typically price in the $100 to $200 per month range depending on commitment. The thesis is that glucose stability supports weight management, and the product is the coaching loop around that thesis.

What spike is

spike is a CGM companion app, not a program. You bring your own sensor (Stelo, Dexcom G6/G7, Libre, or Lingo via Apple Health), log meals by photo, voice, or search, and spike computes each meal's full glucose response: baseline, peak, how far you rose, and how long you took to recover. The verdict arrives as a notification. Over days and weeks you build a personal map of what spikes you and what doesn't.

Head to head

	spike	Signos
Primary goal	Understand your meal responses	Lose weight using glucose signals
Cost model	BYO sensor + $129.99/yr (or $19.99/mo), free trial	Program subscription with bundled sensors, ~$100 to $200/month
Per-meal response curves	Yes, automatic for every logged meal	Glucose chart with logging; nudge-centric
Real-time nudges	No (verdicts arrive when meal data completes)	Yes, a core feature
Sensor choice	Any CGM in Apple Health	Dexcom via Signos plans
Commitment	None	Plans reward longer commitments
Platform	iOS	iOS, Android

Where Signos wins

If weight loss is the goal and you respond well to in-the-moment prompts, Signos's real-time nudge loop is something spike deliberately doesn't do. Its access to more immediate Dexcom data streams enables that. Android support and the single-box bundle are also points in its favor.

Where spike wins

You keep the understanding. Nudges act on you; curves teach you. When you can see that white rice spikes you 60 points but sushi rice with fish barely moves you, that knowledge is yours forever, with or without an app subscription.

Cost and freedom. No program pricing, no plan commitment, no bundled hardware markup. Your sensor is yours from any retailer, your data lives in Apple Health on your device, and spike is $129.99 a year, a fraction of a program fee.

Scope. Not everyone wearing a CGM wants to lose weight. Steady energy, prediabetes concern, athletic fueling, plain curiosity: spike serves the general question (what does food do to me?) rather than a single outcome.

The bottom line

Choose Signos if you specifically want a glucose-guided weight-loss coach whispering in your ear all day, and the program price fits. Choose spike if you want to actually learn your body's responses, meal by meal, from the sensor you already own, for far less money. Understanding travels; nudges stop when the subscription does.

learn what spikes you.

Every meal you log becomes an answer. Free trial on the App Store.

Download on the App Store

spike is a wellness app, not a medical device. It does not provide medical advice, diagnosis, or treatment, and it is not a weight-loss program. Signos details are based on publicly available information as of July 2026 and may change. spike is not affiliated with Signos or Dexcom.