Comparison

Hydrawise vs SurvivalKnife

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

Head to head
About

Hydrawise

Optimize your irrigation with intelligent watering schedules based on local weather forecasts. This app helps conserve water while ensuring your landscape stays healthy and vibrant. Manage your irrigation system remotely for ultimate convenience.

Highlights
  • Predictive Watering™
  • Local weather insights
  • Water savings optimization
  • Lush landscape creation
  • Remote irrigation management
Read full description

Elevate Your Irrigation Experience with Hydrawise! Discover the ultimate in irrigation control with the Hydrawise App. Harness the power of Predictive Watering™, fueled by local weather data, to optimise water usage and enhance your landscape's vitality. Key Features: Predictive Watering: Let advanced algorithms adjust schedules based on local weather forecasts, saving water and promoting a thriving landscape. Improved Local Weather Insights: Dive into weather data with enhanced icons and descriptors that make it easier to understand the forecast's impact on your irrigation schedule. Maximise Water Savings: Hydrawise intelligently adapts watering schedules, conserving water without compromising landscape health. Lush Landscapes: Create an environment of beauty and sustainability by tailoring irrigation to your landscape's unique needs. Stay Connected: Never lose touch with your irrigation system — manage it remotely and with ease. Experience the Future of Irrigation: Hydrawise empowers you to take command of your irrigation system like never before. • Embrace the power of Predictive Watering, seamlessly integrating local weather data to optimise water usage. • Cultivate a landscape that flourishes while saving water and effort. • Stay in touch with your irrigation, from anywhere, anytime. Download the app now and embark on a journey to transform your landscape into a masterpiece of efficiency and beauty!

About

SurvivalKnife

This app helps you create personalized emergency preparedness plans for your household, considering individual needs and local hazards. It offers offline maps, routing, and inventory management, ensuring you're ready even without cell service.

Highlights
  • Personalized household emergency plans
  • Offline maps and turn-by-turn routing
  • Inventory tracking and readiness scoring
  • Household records and printable cards
  • Private encrypted vault for documents
  • Real-time local hazard notifications
  • Daily survival lessons and field guide
Read full description

Most emergency advice is written for a generic family that doesn't exist. SurvivalKnife builds a plan around the people actually in your home - their medications and mobility needs, your pets, your dwelling, your vehicles - and it keeps working when the cell network doesn't. A PLAN FOR YOUR ACTUAL HOUSEHOLD Answer a few questions and SurvivalKnife writes a plan specific to you: who lives there, what they need, and the hazards where you live. Every plan comes with an action checklist you can tick off, attach photos to, and print. Seven ready-made plans - flood, wildfire, hurricane, earthquake, tornado, power outage and more - work instantly and offline. Personalize any of them to make it yours. When something isn't on file, the plan asks you instead of guessing. OFFLINE MAPS AND OFFLINE ROUTING Download the states you care about and get a real map with turn-by-turn routing and no cell service at all. The routing engine runs on your phone, not in the cloud. Layers for shelters, hospitals, fire and police, and water stay available offline, plus cellular coverage maps so you know where you'd get a signal. KNOW WHAT YOU HAVE - AND WHAT'S MISSING Scan a shelf with your camera or add items by voice. SurvivalKnife scores your readiness against real scenarios and shows the next most important gap to close. The needs calculator does the math for your household: calories, water, sanitation and days of supply, adjusted for climate and activity. ONE PLAN, EVERY PHONE IN THE HOUSE Family Edition covers up to 5 people. Plans, saved materials, routes, inventory and your household profile stay in sync on everyone's phone. Younger members get Youth View - a simplified version that shows only what a guardian has approved for them. HOUSEHOLD RECORDS, READY WHEN YOU NEED THEM Printable medical and contact wallet cards. Blood types, medications, allergies, mobility needs, key contacts, addresses with dwelling details and vehicles - all in one place, all feeding your plans. A PRIVATE VAULT THAT STAYS ON YOUR PHONE Passports, insurance, IDs. Vault items stay on your device, never sync to your household, and are excluded from AI and search. Set a vault PIN to encrypt them. KNOW WHAT'S HAPPENING NEAR YOU Wildfire detections, weather warnings, air quality and earthquakes on the map, with notifications for the ones near your home. LEARN BEFORE YOU NEED IT A two-minute daily survival lesson with streaks and skill paths, plus an offline field guide covering water, first aid, shelter and navigation - readable with no connection. PRIVACY Your Personal Vault never syncs - not to us, not to your household - and setting a vault PIN encrypts it on your device. Household details shared with AI to build a plan are minimized: first names only, never phone numbers, emails or addresses. Maps and routing run on your phone. No ads. No data sold. SUBSCRIPTION Start with a 14-day free trial of everything. Then Field Edition is $19.99/year for one person, or Family Edition is $39.99/year for a household of up to 5 - about 67 cents per person per month. Everything you set up during the trial is saved. Subscriptions are billed annually to your Apple Account and renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://survivalknife.ai/privacy IMPORTANT SurvivalKnife is a preparedness and educational reference tool. It is not a substitute for professional training, qualified medical care, or emergency response services. It does not contact emergency services, monitor your location, or alert anyone on your behalf. In any actual emergency, call 911 or your local emergency number.

Screenshots

Hydrawise4 screens
SurvivalKnife4 screens

Verdict

The call

The clearest difference is in-app purchases: Hydrawise at none against SurvivalKnife's 2. Hydrawise also leads on ratings volume (67K vs 1). SurvivalKnife's advantage is rating (5.0 vs 4.7) and update cadence (every 10 days vs every 3 weeks). On price, ads, device support and iOS requirement 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. SurvivalKnife sells 2 in-app purchases, starting at $19.99 per year. Hydrawise asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SurvivalKnife holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Hydrawise has 67K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Hydrawise ships an update every 3 weeks, SurvivalKnife every 10 days. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

Scorecard5 real differences · 5 level
Hydrawise versus SurvivalKnife: the parameters behind the verdict, then further details
ParameterHydrawiseSurvivalKnife
PriceFreeFree
Rating4.7 (67K ratings)5.0 (1 ratings) — better
Positive reviews39.0% of reviews—
Number of ratings67K — better1
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size143 MB170 MB
Age rating4+12+
DeveloperHunter IndustriesAtherton Labs LLC

Customer experience

Hydrawise

All ratings66,751 ratings
Positive92.2%
Neutral1.9%
Negative5.9%
Written reviews878 reviews
Positive39.0%
Neutral9.5%
Negative51.6%

SurvivalKnife

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

Bugs and requests

Hydrawise

Reported bugs

3 issues
  • App crashes on launch
  • Zones not starting as scheduled
  • Incorrect flow rate and water usage data

Requested features

4 requests
  • Ability to pause/resume programs
  • Customizable watering schedules
  • Improved reporting and historical data
  • Easier manual zone control

SurvivalKnife

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Hydrawise

No in-app purchases

2 purchases

SurvivalKnife

Subscriptions2
  • Field Edition14 Days trial$19.991 Year
  • Family Edition14 Days trial$39.991 Year

Questions

Is Hydrawise free?
Hydrawise is free to download, with no in-app purchases.
Is SurvivalKnife free?
SurvivalKnife is free to download, with in-app purchases available.
Which has better reviews, Hydrawise or SurvivalKnife?
SurvivalKnife is rated higher. Hydrawise averages 4.7 out of 5 from 67K ratings, while SurvivalKnife averages 5.0 from 1 ratings.
Do Hydrawise or SurvivalKnife have ads?
Neither Hydrawise nor SurvivalKnife shows ads.
Which is updated more often, Hydrawise or SurvivalKnife?
Hydrawise ships an update every 3 weeks, and SurvivalKnife every 10 days. Most recently, Hydrawise was updated on November 1, 2026 and SurvivalKnife on October 29, 2026.

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