Comparison

IkiJime Tool vs STAmina Apnea Trainer

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

Head to head
About

IkiJime Tool

This app guides anglers on how to humanely dispatch fish using the ikijime method. It offers detailed information, including x-rays and brain locations, for over 200 species, accessible offline.

Highlights
  • Humane fish dispatch guide
  • Ikijime method instructions
  • X-rays showing brain location
  • Database of 200+ fish species
  • Offline functionality
  • GPS-based sorting
  • Customizable favorites list
Features
Read full description

IkiJime Tool is a fishing app that helps anglers dispatch their fish quickly and humanely using the ikijime method of brain destruction, a method scientifically proven to minimise stress for the fish while also maximising its eating qualities. The app provides convenient “network free” access to cool photos and x-rays (together with helpful information on the brain location and other interesting fishy facts) for over 200 popular species of fish and sharks targeted by anglers worldwide. The latest 3.0.4 version of this app is our most comprehensive update yet, using completely updated back end code, which results in an optimised search function with speedier lookups of the restructured database. You can still use your GPS and let the app automatically sort its database depending on your location. Or you can search using our traditional search by region, subregion and water type, or you may prefer the "Text Search" function to examine the entire www.ikijime.com database quickly and easily in alphabetical order. Alternatively, the "Taxonomic Search" allows you to view your fish of interest (and their close relatives) by their scientific names. For convenience you can shortlist your favourite fish species to your own "Favourites" list which makes finding them even easier. Once you have selected your fish from the database by hitting "Go Fish", the fishes data page will appear with many fishy facts including alternative names, description, distribution, common and maximum sizes and more. You can then hit the x-ray button on the top right to use the very cool slide tool that shows the brain location of your fish superimposed as a white spot over easily recognised external landmarks. Stick your brain spike into the spot, the fish is instantly and humanely killed, and you have dinner ! Other useful features include a "Camera" function that allows you to take pictures of your catch to send to your friends for identification or bragging rights, and the "Settings" page, where you can adjust the default app options to your liking, sync with the database to retrieve information on new fish species as they arrive, or download PDF brochures to print out, laminate and take fishing with you. Like our previous Ikijime Tool Extreme app, the latest version of Ikijime Tool will work in regions where there is no phone or internet coverage (after all, the best fishing spots tend to be in the most remote areas !). All you have to do is download the app from the store then sync the app (in the setting section) to ensure that the entire www.ikijime.com database is instantly available on your phone at your fingertips where ever you are on earth. Users who already had our previous versions of Ikijime Tool should be able upgrade to the new app without cost. Otherwise, new users will be prompted to purchase the app after 10 database searches. Thanks to the Ocean Health Foundation and NSW Fisheries Trust for their financial support, as well as the QLD Government Business Basics Grants Program, all of whom have contributed funds to partially defray the cost of developing this app. For those Governments or other institutions wanting to increase the number of species in the database for their region, please contact us on info@ikijime.com.

About

STAmina Apnea Trainer

This app helps users improve their breath-holding capabilities for activities like freediving, spearfishing, and other water sports. It offers various training tables and personalized programs to enhance physical and mental endurance underwater.

Highlights
  • 6 Apnea table options (O2 deprivation, CO2 tolerance, Wonka, Mix, Custom, Pranayama)
  • Personalized training programs with 3 difficulty levels
  • Customizable exercise settings
  • Training reminders
  • Detailed statistics and training history
  • Voice guidance
  • Heart rate and oxygen saturation tracking (requires compatible monitor)
Features
Read full description

BY FREEDIVERS, FOR FREEDIVERS TO STAY UNDERWATER FOR LONGER. ► Helps with physical and mental aspects of improving the ability to hold your breath ► Over 50k+ users Hold your breath longer underwater with the best freediving apnea trainer – STAmina Apnea Trainer. By freedivers, for freedivers, our freedive apnea trainer helps you with static apnea tables and lung capacity training so you can effectively increase the time when diving underwater. See why STAmina Apnea Trainer is one of the best apnea apps to improve the breath-holding time for freediving, scuba diving and spearfishing, as well as surfing, running, and other water sports with 6 different apnea tables types. ■ FREEDIVING & SPEARFISHING APNEA TRAINER FEATURES: ◉ 6 APNEA TABLE OPTIONS STAmina Apnea Trainer can create / generate custom apnea (exercises that are automatically created based on the maximum breath-hold and match the user’s level) or let you select from the following customizable table types: - O2 deprivation table – accustoms a body to lower oxygen levels. This is achieved by increasing the amount of time that you hold your breath on each attempt, while the resting time is fixed. - CO2 Tolerance table – helps a body to adapt to high carbon dioxide levels. This is achieved by decreasing the length of resting time between fixed breath-hold periods. - Wonka table – a variation of CO2 tables. Apnea timer starts after the first contraction, the rest time takes one breath. - Mix table – tables where apnea time increases and rest time decreases with each round. - Custom table – allows mixing of different approaches to create a custom training, thus generating the most effective training program. - Pranayama – a breathing technique to decrease stress in the body and relax the nervous system. ◉ APPLE HEALTH SYNCRONIZATION ◉ PERSONALIZED TRAINING WITH VARYING DIFFICULTY When you start working with the application, you set your personal record in breath holding. Based on this data, the app will offer a personalized training program with exercises of 3 difficulty levels to choose from: easy, normal, and hard. ◉ PERSONALIZED EXERCISE SETTINGS Each exercise can be edited by setting your own number of repetitions, breath hold time, rest time, etc. ◉ TRAINING REMINDERS Get the notification to start your apnea training. Set a reminder in the apnea diver app for the day and the time & get a notification to do a breath holding training session. ◉ PERSONAL STATISTICS AND DETAILED TRAINING HISTORY All your workouts and exercises are recorded in the freedive trainer app to track the detailed progress of each training. ◉ VOICE GUIDANCE Training may be accompanied by voice guidance with male/female voices recorded by professional voice actors. STAmina supports English, French, Russian voice guidance. ◉ HEART RATE AND OXYGEN SATURATION TRACKING Track your heart rate while doing breath holding exercises (a compatible HR monitor or pulse-oximeter is required) ◉ CONTRACTIONS TRACKING Use our freedive trainer to track unlimited contractions, analyse captured data after exercises ◉ CLOUD SYNC / BACKUP Access your data on multiple devices and easily restore it in case you switch devices/phones. ----- Stamina Apnea Trainer allows training breath hold effectively for anyone who cares about all kinds of diving including: > beginner or professional freedivers; spearfishers; > scuba divers to learn how to dive longer on one tank; > surfers in case of unexpected breath hold; > underwater sports athletes such as underwater rugby, hockey, etc. > runners who want to train breath holding & high tolerance to CO2 while running _______ Web: https://getstamina.app/ Terms of Use: https://getstamina.app/terms_of_use_app.html Privacy Policy: https://getstamina.app/privacy_policy_app.html Support: support@squarecrowdapps.com

Screenshots

IkiJime Tool3 screens
STAmina Apnea Trainer4 screens

Verdict

The call

The clearest difference is rating: STAmina Apnea Trainer at 4.9 against IkiJime Tool's 2.3. STAmina Apnea Trainer also leads on review sentiment (88% vs 50%) and update cadence (every 6 days vs every 16 months). IkiJime Tool's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model 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. IkiJime Tool sells 1 one-off in-app purchase and STAmina Apnea Trainer sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

STAmina Apnea Trainer holds the better App Store score, 4.9 against 2.3. That said, the two scores are not equally well evidenced: STAmina Apnea Trainer has 5.4K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of IkiJime Tool's written reviews are positive against 88% of STAmina Apnea Trainer's.

UpkeepUpdate frequency

IkiJime Tool ships an update every 16 months, STAmina Apnea Trainer every 6 days. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
IkiJime Tool versus STAmina Apnea Trainer: the parameters behind the verdict, then further details
ParameterIkiJime ToolSTAmina Apnea Trainer
PriceFreeFree
Rating2.3 (3 ratings)4.9 (5.4K ratings) — better
Positive reviews50.0% of reviews88.5% of reviews — better
Number of ratings35.4K — better
Update frequencyEvery 16 monthsEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size33 MB55 MB
Age rating4+17+
DeveloperDigsFish Services Pty LtdSquarecrowd Apps, LLC

Customer experience

IkiJime Tool

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

STAmina Apnea Trainer

All ratings5,437 ratings
Positive99.3%
Neutral0.5%
Negative0.2%
Written reviews355 reviews
Positive88.5%
Neutral5.4%
Negative6.2%

Bugs and requests

IkiJime Tool

Not enough reviews yet to summarise bugs or requests.

STAmina Apnea Trainer

Reported bugs

5 issues
  • Apple Watch app doesn't synchronize reliably
  • Watch app missing features of phone app
  • Random beeps and haptics not selected in settings
  • App crashes when run from synced phone
  • HRV not recorded in Apple Health

Requested features

8 requests
  • Recommended training regimens based on goals
  • Voice announcements of passing time
  • Ability to pause/resume rest intervals
  • Apple Watch app with same functionality as phone app
  • Integration with more pulse oximeters
Show 3 more
  • Ability to edit personal records
  • Progress tracking graphs
  • More guided tutorials and onboarding

In-app purchases

1 purchases

IkiJime Tool

One-time1
  • Ikijime Tool Extreme$2.99
2 purchases

STAmina Apnea Trainer

Subscriptions2
  • STAmina Pro (1 Month)$4.991 Month
  • STAmina Pro (1 Year)7 Days trial$29.991 Year

Questions

Is IkiJime Tool free?
IkiJime Tool is free to download, with in-app purchases available.
Is STAmina Apnea Trainer free?
STAmina Apnea Trainer is free to download, with in-app purchases available.
Which has better reviews, IkiJime Tool or STAmina Apnea Trainer?
STAmina Apnea Trainer is rated higher. IkiJime Tool averages 2.3 out of 5 from 3 ratings, while STAmina Apnea Trainer averages 4.9 from 5.4K ratings.
Do IkiJime Tool or STAmina Apnea Trainer have ads?
Neither IkiJime Tool nor STAmina Apnea Trainer shows ads.
Which is updated more often, IkiJime Tool or STAmina Apnea Trainer?
IkiJime Tool ships an update every 16 months, and STAmina Apnea Trainer every 6 days. Most recently, IkiJime Tool was updated on November 1, 2026 and STAmina Apnea Trainer on November 6, 2026.

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