Comparison

X Factor vs The Deficit

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

Head to head
About

X Factor

Easily track your daily calorie balance for weight management. Focus on calories in and out, with features to predict target weight achievement and verify data accuracy. Integrates with HealthKit for automatic calorie import.

Highlights
  • Daily calorie balance tracking
  • Weight and activity calorie logging
  • Target weight prediction
  • BMI and BMR calculation
  • HealthKit integration
  • Weight unit support
Features
Read full description

X Factor is designed to quickly and easily track your daily calorie balance. No micro-nutrients. No detailed workout info. Just calories in and calories out, because when it comes to maintaining a healthy weight, that's what matters. With X Factor, it takes only a few seconds to record your daily weight, calories eaten, and activity calories. And with Health Integration enabled, active energy calories are imported automatically from HealthKit. The powerful Target Weight feature lets you set calorie and weight targets to see how your weight will change with different calorie balances. Once you've entered your calorie balance for a few days, the Accuracy feature compares the calorie balance data you've entered against the calories associated with changes to your weight, making it easy to verify that your data is correct. Whatever your weight management goals, your daily calorie balance is the key to acheiving them. Without it, you're stuck in a constant state of guessing that undermines your results. Take control of your weight with the power of clear, concise measurement. Features: - Lifetime tracking of weight, calories eaten and activity calories - Predicts when target weight will be reached - Calculates BMI and BMR values - Supports kilograms/pounds/stones weight units - 3D Touch shortcuts for logging data Health App Integration: - import active energy calories, age, gender and height - export your weight

About

The Deficit

Features
Read full description

Understand your calorie balance. Log food your way. The Deficit brings your calorie intake, energy expenditure and progress together in a clear daily overview, using Apple Health data from the apps and devices you already use. SEE THE BIG PICTURE • Follow your calorie balance across days and custom date ranges. • See intake, macros, resting and active energy, and exercise. • Set a goal and compare your estimated progress. Days with incomplete intake can be excluded from the balance calculation. AGENTIC FOOD TRACKING — OPTIONAL, EFFORTLESS Tell the AI agent what you eat and how much, and it logs the meal for you. Dictate foods and gram amounts, or photograph a nutrition label and say or type “Log 200 g of this food.” The agent reads the label, calculates the portion and adds it to your diary. If something is unclear, it asks a follow-up question. • Log meals by typing, dictating or taking a photo on iPhone or iPad. • Ask follow-up questions in chat or start a live voice conversation. • Review and edit portions and nutrition values. • Reuse familiar foods from your food memory. • Keep your diary and conversation in sync across iPhone, iPad and Apple Watch. KEEP YOUR EXISTING TRACKER Prefer another food app? Turn off food tracking and continue using The Deficit as your Apple Health calorie-balance overview. YOUR CHOICES Sign in with Apple keeps your account connected across devices. AI processing requires a separate permission. Apple Health access and optional cloud Health summaries remain under your control. You can delete your account in the app. AI uses credits. New accounts receive welcome credits; additional packs are available as one-time in-app purchases. Purchased credits do not expire while your account exists. At zero credit, AI pauses; your existing data and manual features remain available. Internet access is required for AI and cloud synchronization. Nutrition values and projected weight changes are estimates. Check suggested foods and portions before relying on them. The Deficit is not a medical device and does not provide medical diagnosis or treatment.

Screenshots

X Factor4 screens
The Deficit4 screens

Verdict

The call

The clearest difference is update cadence: X Factor at weekly against The Deficit's every 17 months. X Factor also leads on iOS requirement (8.0 vs 17.5). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

X Factor ships an update weekly, The Deficit every 17 months. Both last shipped on September 30, 2026.

Scorecard2 real differences · 8 level
X Factor versus The Deficit: the parameters behind the verdict, then further details
ParameterX FactorThe Deficit
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings4 — better—
Update frequencyWeekly — betterEvery 17 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS8.0 — better17.5
Further details — not scored
Size20 MB22 MB
Age rating4+12+
DeveloperDaniel Hansen5 LADISLAV HRBACEK

In-app purchases

None

X Factor

No in-app purchases

None

The Deficit

No in-app purchases

Questions

Is X Factor free?
X Factor is free to download, with no in-app purchases.
Is The Deficit free?
The Deficit is free to download, with no in-app purchases.
Do X Factor or The Deficit have ads?
Neither X Factor nor The Deficit shows ads.
Which is updated more often, X Factor or The Deficit?
X Factor ships an update weekly, and The Deficit every 17 months. Most recently, X Factor was updated on September 30, 2026 and The Deficit on September 30, 2026.

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