Protein Spy: Trolley Tracker

Lantern 6 Studios

Contains ads

About this app

Protein Spy tracks the cheapest protein per pound at every major UK supermarket, every day.

Whether you're chasing gains, feeding a family, or just tired of your protein bill creeping up, Protein Spy shows you where each pound goes furthest — right now, today.

Protein Spy displays supermarket product prices gathered from third-party data sources. Retailer names are used only to identify where products are sold (nominative use), and the app is not affiliated with or endorsed by any retailer. Prices are presented as factual information for comparison purposes. No copyrighted supermarket branding, product imagery, or marketing content is used.

What it does

• Compares chicken, beef, fish, eggs, dairy, plant proteins and whey across Tesco, Sainsbury's, Aldi, Lidl, Waitrose, Asda, Morrisons and M&S.
• Ranks everything by pence per 10g of protein — the only fair way to compare a chicken pack, a tuna multipack and a whey tub.
• Updates daily so you're never shopping on last week's prices.
• Filter for vegan, vegetarian, red meat, white meat, fish, dairy or powders.
• Tap any item for a full breakdown: pack size, protein content, price per kg.

High-protein recipes, costed live

Every recipe in Protein Spy is priced live at each supermarket using today's data. Chicken fried rice cheaper at Aldi tonight? Lentil dhal at Tesco? The app tells you where your basket wins.

Freemium, honestly

The full price radar is free forever, ad-supported. Premium (£2.99/month) unlocks the full recipe library and removes ads. Cancel anytime.

Everything you'd expect

• No account or sign-up required.
• Favourites saved on your device only.
• Full privacy policy at proteinspy.co.uk/privacy.

Prices are indicative, gathered daily from third-party sources, and may differ in store or online. Always check before you buy. Protein Spy is not affiliated with or endorsed by any supermarket.