Comparison

Hydralert vs NutrientOS

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

Head to head
About

Hydralert

Easily track your fluid intake, including water, caffeine, and alcohol, to maintain optimal hydration. Set personalized goals and gain insights into your hydration patterns with user-friendly analytics. Achieve your daily hydration targets with this intuitive health companion.

Highlights
  • Hydration tracking
  • Caffeine and alcohol monitoring
  • Customizable hydration goals
  • Insightful hydration analytics
  • User-friendly interface
Features
Read full description

Hydralert is a mobile application designed to help users maintain optimal hydration levels. It focuses on tracking the intake of various fluids, including water, caffeine, and alcohol, providing a comprehensive view of one's hydration status. Here are some key features of Hydralert: Hydration Tracking: Users can log their water intake throughout the day. The app allows for easy input and tracking of how much water they drink, helping them meet their daily hydration goals. Caffeine and Alcohol Monitoring: In addition to water, Hydralert tracks the consumption of beverages like coffee, tea, and alcohol. This feature is particularly useful for understanding how different types of drinks affect overall hydration. Customizable Goals: The app offers personalized hydration goals based on the user's individual needs, lifestyle, and activity level. Users can set and adjust their daily water intake targets as needed. Insightful Analytics: Hydralert provides users with analytics and insights into their hydration patterns. This data helps users understand their habits and make informed decisions to improve their hydration. User-Friendly Interface: The app boasts an intuitive and easy-to-navigate interface, making it accessible for users of all ages and tech-savviness levels. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

NutrientOS

Track your nutrition, understand your meals, and build healthier habits with food logging, macro and micronutrient tracking, and workout logging. Optional AI tools offer advanced guidance and insights for personalized wellness.

Highlights
  • Food diary with calories, macros, and micronutrients
  • Barcode and food search
  • Restaurant menu browsing
  • Fitness, hydration, and sleep tracking
  • AI meal scan
  • AI Coach for guidance
  • AI recipe builder
Features
Read full description

NutrientOS is a calorie counter, macro tracker, micronutrient tracker, food scanner, workout log, and progress tracker built for people who want more than basic food logging. Track calories, protein, carbohydrates, fat, vitamins, minerals, meals, workouts, recovery, biometrics, and long-term progress in one place. Search foods, scan barcodes, create recipes, compare restaurant meals, and review detailed nutrition insights to better understand what you eat. FOOD, CALORIE, AND MACRO TRACKING • Log meals with a detailed food diary • Track calories, protein, carbohydrates, fat, and micronutrients • Search foods and scan product barcodes • Create custom foods and recipes • Save favorites and schedule recurring foods • Review recent foods for faster logging • Track serving sizes, grams, and portions DETAILED NUTRITION INSIGHTS • View vitamins, minerals, amino acids, and nutrient coverage • Review food grades and ingredient-based food-quality insights • See satiety, absorption, and food-pairing information • Identify nutrient gaps and food sources • Review daily and longer-term nutrition trends • Understand when nutrient information is estimated or unavailable RESTAURANT NUTRITION • Browse restaurant menus • Search thousands of menu items • Compare meals side by side • Sort by calories, protein, sodium, food grade, and protein density • Find options that better match your nutrition goals FITNESS, RECOVERY, AND PROGRESS • Log workouts and training sessions • Track weight and body measurements • Record water, supplements, sleep, mood, energy, and recovery • Track supported biometrics and custom health metrics • Review nutrition, training, and recovery patterns over time • Connect supported Apple Health data IMPORT AND EXPORT • Import supported MyFitnessPal data • Import supported Cronometer data • Export your personal NutrientOS data • Keep your existing nutrition history in one place NUTRIENTOS PRO AND PREMIUM NutrientOS Pro and NutrientOS Premium require an additional in-app purchase. Paid features may include: • AI Meal Scan for estimating food and nutrition from a photo • NutrientOS Coach for nutrition and fitness guidance • AI Recipe Builder • AI meal-plan generation • AI training-plan generation • Body-composition photo analysis • Weekly nutrition and progress checkups • Advanced nutrition, training, and recovery insights • Interactive charts and longer reporting ranges • Higher AI usage limits SUBSCRIPTIONS NutrientOS Pro and NutrientOS Premium are optional auto-renewable subscriptions. Payment is charged to your Apple ID account after purchase confirmation. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription in your App Store account settings. IMPORTANT INFORMATION NutrientOS is intended for informational wellness, nutrition, and fitness tracking. It does not provide medical diagnosis, medical treatment, or medical advice. AI-generated estimates and guidance may be incomplete or inaccurate and should be reviewed before use. Consult a qualified healthcare professional regarding medical concerns or major changes to your diet or exercise routine. Terms of Use: https://nutrientos.com/terms Privacy Policy: https://nutrientos.com/privacy

Screenshots

Hydralert4 screens
NutrientOS4 screens

Verdict

The call

The clearest difference is update cadence: Hydralert at every 2 days against NutrientOS's fortnightly. NutrientOS's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and ads 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. Hydralert sells 3 in-app purchases, starting at $2.99 per month and NutrientOS sells 2 in-app purchases, starting at $7.99 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 Hydralert against 5.0 for NutrientOS. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Hydralert ships an update every 2 days, NutrientOS fortnightly. The most recent releases landed on September 6, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
Hydralert versus NutrientOS: the parameters behind the verdict, then further details
ParameterHydralertNutrientOS
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings11
Update frequencyEvery 2 days — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size69 MB22 MB
Age rating4+17+
DeveloperColby MehmenJeremiyah Escobedo

Customer experience

Hydralert

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

NutrientOS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Hydralert

Subscriptions2
  • Monthly$2.991 Month
  • Annually3 Days trial$9.991 Year
One-time1
  • Lifetime Access$14.99
2 purchases

NutrientOS

Subscriptions2
  • Atlas Pro Monthly$7.991 Month
  • Atlas Premium Monthly$12.991 Month

Questions

Is Hydralert free?
Hydralert is free to download, with in-app purchases available.
Is NutrientOS free?
NutrientOS is free to download, with in-app purchases available.
Which has better reviews, Hydralert or NutrientOS?
Hydralert and NutrientOS are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Hydralert or NutrientOS have ads?
Neither Hydralert nor NutrientOS shows ads.
Which is updated more often, Hydralert or NutrientOS?
Hydralert ships an update every 2 days, and NutrientOS fortnightly. Most recently, Hydralert was updated on September 6, 2026 and NutrientOS on September 19, 2026.

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