Comparison

Carbon vs AXIS HP

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

Head to head
About

Carbon

This app acts as a personalized nutrition coach, helping you track your food intake and weight to adjust your calorie and macro targets. It provides weekly check-ins with clear explanations for any changes made to your plan, supporting various dietary goals like fat loss or muscle gain.

Highlights
  • Adaptive macro coaching
  • Personalized calorie and macro targets
  • Weekly weight trend analysis
  • Flexible calorie planner
  • Smart food logging with photo recognition
  • Support for various diet styles
Features
Read full description

The macro tracker that coaches you. Carbon Diet Coach is a nutrition coach and calorie tracker in one. Log your food, weigh in, and check in once a week. Carbon reviews your weight trend and what you logged, decides whether your targets should change, and explains every decision. Carbon pioneered adaptive macro coaching, and thousands of members use it to lose fat, build muscle, maintain, and reverse diet. HOW WEEKLY COACHING WORKS • Answer a few questions about your goal, body, and preferences • Get personalized calorie, protein, carb, and fat targets • Log your food and weigh in, or sync your weight from Apple Health • Check in weekly. Carbon looks at your multi-week weight trend and what you actually logged, then adjusts your macros or holds them steady • Read a clear check-in report, so you're never left wondering why Carbon did or didn't make a change • Pick your check-in day, or check in early when your schedule changes PROTEIN BUILT AROUND YOU Your protein target is based on your lean body mass, with an optimal range for your goal and diet style. Research links higher protein intake during fat loss to keeping more lean mass, so Carbon keeps protein front and center all week. FLEXIBLE CALORIE PLANNER The Calorie Planner works like a weekly calorie budget. Give yourself more calories for weekends, dinners out, and events, and fewer on quieter days, while your week stays on target. • Finished days reflect what you actually tracked, and the rest of your week rebalances around them • Hold protein keeps your protein target steady while daily calories shift • Adjust calories, protein, carbs, and fat for any upcoming day, or reset a day to your weekly defaults COACHING WITH GUARDRAILS When progress stalls, Carbon makes small changes instead of big cuts, keeps your rate of loss in check, and sets a calorie floor for you. If you reach it, Carbon recommends a switch to maintenance or a reverse diet. If your week wasn't fully tracked, Carbon won't react to incomplete data. SMART LOGGING Smart Logger: snap a photo of your meal or describe it, and Carbon matches each food to an entry in our verified food database. You review the matches, confirm your servings, and log the whole plate at once. Smart Suggestions: foods you log often are pre-filled in your diary. Tap to confirm or skip. Remaining Macros: see what's left for the day and preview how a food fits before you log it. Serving Amount Solver: enter the macros you have left and Carbon finds the serving that fits. Plus a barcode scanner, nutrition label scanner, quick add, copy meals, favorites, and custom foods and recipes. GOALS AND DIET STYLES Fat loss, muscle gain, weight maintenance, and reverse dieting. Choose Balanced, Low Carb, Low Fat, Keto, Plant-Based, or High Protein then fine-tune each macro within recommended ranges. PROGRESS YOU CAN SEE Charts for weight, body fat, lean body mass, calories, macros, and estimated metabolic rate, plus a check-in history showing every adjustment and why. ALREADY HAVE YOUR OWN TARGETS? Use Carbon as a macro, protein, and nutrition tracker, calorie counter, and food log. SUPPORT FROM REAL PEOPLE Questions go to Carbon's support team, and members share tips in our private community. BUILT ON EVIDENCE Created by Dr. Layne Norton (PhD, Nutritional Sciences) and Keith Kraker, RD. SUBSCRIPTIONS Monthly, 6-month, and yearly plans. Every plan includes full access to all features. Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings. Payment is charged to your Apple Account when you confirm your purchase. Food database powered by FatSecret: https://fatsecret.com Terms and Conditions: https://joincarbon.com/terms-and-conditions/ Privacy Policy: https://joincarbon.com/privacy-policy/

About

AXIS HP

This app offers structured insights into readiness, workload, stress, and recovery for high-demand professionals. It aims to enhance decision quality, prevent burnout, and ensure sustained performance by making risks visible early.

Highlights
  • Readiness tracking
  • Workload monitoring
  • Stress and recovery insights
  • Performance risk visibility
  • Structured system for accountability
  • Decision quality protection
Features
Read full description

Designed for law enforcement, fire service, tactical professionals, elite athletes, and high-performing executives. AXIS provides structured visibility into readiness, workload, stress, and recovery. It helps individuals and organizations protect decision quality, reduce preventable breakdowns, and sustain long-term performance. Most platforms optimize for engagement. AXIS optimizes for effectiveness. Most tools motivate behavior. AXIS structures systems. Performance failure is rarely sudden, it is gradual, silent, and cumulative.  AXIS exists to make risk visible early, before performance, health, or careers are compromised. AXIS is intentionally built for disciplined users who value precision, structure, and accountability.

Screenshots

Carbon4 screens
AXIS HP4 screens

Verdict

The call

The clearest difference is in-app purchases: AXIS HP at none against Carbon's 9. Carbon's advantage is update cadence (weekly vs every 3 months) and ratings volume (8.2K vs 4). On price, rating, ads and device support 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. Carbon sells 9 in-app purchases, starting at $11.99 per month. AXIS HP asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AXIS HP holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Carbon has 8.2K ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Carbon ships an update weekly, AXIS HP every 3 months. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 5 level
Carbon versus AXIS HP: the parameters behind the verdict, then further details
ParameterCarbonAXIS HP
PriceFreeFree
Rating4.8 (8.2K ratings)5.0 (4 ratings) — better
Positive reviews79.3% of reviews—
Number of ratings8.2K — better4
Update frequencyWeekly — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#98 — better—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.6 — better18.0
Further details — not scored
Size105 MB11 MB
Age rating17+4+
DeveloperReform LLCJon Barrett

Customer experience

Carbon

All ratings8,144 ratings
Positive95.9%
Neutral1.4%
Negative2.7%
Written reviews459 reviews
Positive79.3%
Neutral6.3%
Negative14.4%

AXIS HP

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Carbon

Reported bugs

2 issues
  • Occasional app crashes or freezes
  • Issues with resetting account data

Requested features

4 requests
  • Add water intake tracking
  • Improve barcode scanning functionality
  • Allow more flexibility in macro adjustments
  • Integrate with fitness trackers

AXIS HP

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Carbon

Subscriptions9
  • Monthly Subscription$11.991 Month
  • Monthly Subscription7 Days trial$11.991 Month
  • Monthly Subscription14 Days trial$11.991 Month
Show 6 more
  • Six Month Subscription$59.996 Months
  • Six Month Subscription7 Days trial$59.996 Months
  • Six Month Subscription14 Days trial$59.996 Months
  • Yearly Subscription$99.991 Year
  • Yearly Subscription7 Days trial$99.991 Year
  • Yearly Subscription14 Days trial$99.991 Year
None

AXIS HP

No in-app purchases

Questions

Is Carbon free?
Carbon is free to download, with in-app purchases available.
Is AXIS HP free?
AXIS HP is free to download, with no in-app purchases.
Which has better reviews, Carbon or AXIS HP?
AXIS HP is rated higher. Carbon averages 4.8 out of 5 from 8.2K ratings, while AXIS HP averages 5.0 from 4 ratings.
Do Carbon or AXIS HP have ads?
Neither Carbon nor AXIS HP shows ads.
Which is updated more often, Carbon or AXIS HP?
Carbon ships an update weekly, and AXIS HP every 3 months. Most recently, Carbon was updated on November 11, 2026 and AXIS HP on October 31, 2026.

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