Comparison

Protein Only vs Slab

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Protein Only

This app focuses solely on tracking daily protein intake with a simple visual dial. It offers quick logging options, personalized goal setting, and optional features for GLP-1 users. The interface is designed for speed and ease of use, avoiding calorie counting or detailed food diaries.

Highlights
  • Visual protein goal ring
  • Quick logging (favorites, quick add, barcode scan)
  • Photo estimate for protein
  • Personalized protein goals
  • GLP-1 mode for muscle protection
  • Streaks and history tracking
  • Optional fiber tracking ring
Features
Read full description

One number. One dial. Did you get your protein today? ProteinOnly is a protein tracker for people who do not want a food diary. No calorie counting. No macro spreadsheet. No guilt about your lunch. You set a daily protein goal in grams, and one big ring on the home screen fills as you eat. LOG IN TWO TAPS • Favorites — yesterday's chicken bowl is one tap away, today and every day • Quick add — type the grams straight in, or pick from a built-in list of common foods • Barcode — scan the package for protein per serving, then set your portion • Photo estimate — snap your plate and get an estimated protein range to confirm or nudge before it saves A GOAL THAT FITS YOU Enter your goal in grams, or let ProteinOnly work it out from your body weight. Presets cover the usual targets, including the higher protein goals that fit GLP-1 journeys and the 1.6 to 2.2 g/kg range active lifters use. It is guidance, not medical advice, and the number is always yours to change. GLP-1 MODE Switch on GLP-1 mode and your goal is sized to protect muscle while you lose weight: 1.2 to 1.6 g of protein per kg of your current or goal weight, the band a 2025 joint nutrition advisory proposes during active weight loss (cited in the app). With Pro, mark your shot day and how your appetite felt; if protein runs short two days in a row after a shot, the home screen says so, with easy ideas, and a monthly muscle-protection summary puts shot-week days next to the rest. Guidance only, never dosing advice. THE RING IS THE POINT The dial is the whole interface. Open the app and you know instantly where you are: grams so far, grams to go, and a satisfying fill on every log. Today's entries sit underneath, editable in a tap. STREAKS AND HISTORY A calendar heat view of the days you hit your goal, 7 and 30-day averages, and a streak worth protecting. Enough history to see a pattern, without turning into a diary you have to maintain. Missed a day? Step back and log it — a forgotten dinner won't break your streak. FIBER, IF YOU WANT IT Turn on an optional second ring for fiber and track it through exactly the same logging paths. Off by default, because one number is the promise. HOME SCREEN WIDGETS Put the ring on your home screen and log without opening the app. REMINDERS THAT SAY SOMETHING USEFUL Optional nudges: a morning start, and an evening check when there is still a gap ("38 g to go — what's for dinner?"). WHO IT IS FOR People eating less overall and wanting protein to stay high. Lifters who already know their number and are tired of logging three other macros to get it. Anyone who tried a full food tracker, lasted nine days, and quit. PRIVATE AND FAST Your log lives on your phone. There is no account and no sign-up. Photos are sent for an estimate only in the moment you ask for one, and are never stored on a server. FREE, AND HONESTLY FREE Manual logging, favorites, barcode scanning, the dial, streaks, and a week of history are free forever, plus 5 AI photo estimates to try. ProteinOnly Pro unlocks unlimited photo estimates, full history and the calendar heat view, GLP-1 shot-day tracking and the monthly summary, home screen widgets, the fiber ring, and reminder customization. Pro comes as an annual auto-renewing subscription that opens with a 7-day free trial, or as a monthly one. Prices are shown in your own currency before you buy. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period; manage or cancel any time in your App Store account settings. ProteinOnly is not a medical device and does not give medical advice. Talk to your doctor or dietitian about the protein target that is right for you. ProteinOnly is made by Adelyons Software LLC. Questions? dev@adelyons.com Terms of Use (EULA): https://adelyons.com/apps/proteinonly/eula.html Privacy Policy: https://adelyons.com/apps/proteinonly/privacy.html

About

Slab

This app focuses solely on tracking your daily protein intake, visualizing your progress with stacked blocks. It offers quick logging of common foods, barcode scanning, and custom entries, all without displaying calories or other nutritional data. The app emphasizes consistency and streaks, keeping your data private on your device.

Highlights
  • Protein-only tracking
  • Visual block-based logging
  • Quick log of frequent foods
  • Barcode scanning
  • Custom food entries
  • Progress streak tracking
  • Private, on-device data
Features
Read full description

Slab is a protein tracker that never shows you a calorie. Not buried in settings. Not calculated in the background. One number, all day: grams of protein, and how far you are from your target. Slab requires a subscription to use. Your first month is free, then $29.99 a year or $5.99 a month. THE STACK Everything you log drops in as a block, sized by the protein it added. A dashed line marks your target. You can read your whole day from across the room. ONE TAP The foods you actually eat sit on the home screen, most-logged first. Chicken breast, whey, Greek yogurt, eggs. Tap once and the block drops in. Most days you never leave this screen. FOR EVERYTHING ELSE • Search a catalog built from USDA data and curated by hand, not scraped from restaurant menus • Scan a barcode for anything packaged • Save your own foods once and log them forever • Type any amount, anywhere, and everything is in grams WHAT HISTORY LOOKS LIKE No charts to interpret. Slab answers the only question worth asking: how often do you hit your target. Hit target 24 of the last 30 days. The streak counts days you logged, not days you were perfect, because one bad Sunday shouldn't erase three weeks. WHAT IS NOT IN HERE No calories. No macro wheels. No food photography. No feed. No account to make. No ads. And no premium tier above the subscription you already have — search and barcode are part of the app, not an upsell. Your data stays on your phone and syncs through your own iCloud. It never reaches a server of ours, because we don't have one. Your first month is free. If Slab isn't the fastest way you have ever logged protein, cancel before the month ends and pay nothing. — Slab, yearly: $29.99 per year, with one month free Slab, monthly: $5.99 per month, with one month free Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours of the end of the current period. You can manage or cancel your subscription in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Protein Only4 screens
Slab4 screens

Verdict

The call

The clearest difference is monetization model: Protein Only at freemium against Slab's subscription. Protein Only also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.6). On price, rating, ratings volume and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Protein Only sells 2 in-app purchases, starting at $3.99 per month and Slab sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Protein Only against 5.0 for Slab. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Protein Only ships an update weekly, Slab every 4 days. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 7 level
Protein Only versus Slab: the parameters behind the verdict, then further details
ParameterProtein OnlySlab
PriceFreeFree
Rating5.0 (2 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings22
Update frequencyWeeklyEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.6
Further details — not scored
Size32 MB9 MB
Age rating+412+
DeveloperAdelyons Software LLCOne Step Forward Ventures

Customer experience

Protein Only

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Slab

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Protein Only

Subscriptions2
  • ProteinOnly Pro (Monthly)1 Month trial$3.991 Month
  • ProteinOnly Pro (Annual)7 Days trial$19.991 Year
2 purchases

Slab

Subscriptions2
  • Monthly1 Month trial$5.991 Month
  • Yearly1 Month trial$29.991 Year

Questions

Is Protein Only free?
Protein Only is free to download, with in-app purchases available.
Is Slab free?
Slab is free to download, with in-app purchases available.
Which has better reviews, Protein Only or Slab?
Protein Only and Slab are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do Protein Only or Slab have ads?
Neither Protein Only nor Slab shows ads.
Which is updated more often, Protein Only or Slab?
Protein Only ships an update weekly, and Slab every 4 days. Most recently, Protein Only was updated on November 7, 2026 and Slab on November 6, 2026.

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