Comparison

Stark Bag vs Aikido Encyclopedia

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

Head to head
About

Stark Bag

This app offers a virtual training experience with HD exercise videos and customizable workout plans. It supports various training styles like Tabata and HIIT, tracks progress, and integrates with Apple Health to log burned calories and completed workouts.

Highlights
  • HD exercise videos
  • Customizable workout plans
  • Tabata, HIIT, and Circuit training timers
  • Progress tracking and scoring
  • Targeted muscle group exercises
  • Apple Health integration
Features
Read full description

Optimize your results with Virtual Trainer Bag! - Be inspired by 27 exercises presented in sharp HD video. - Create your own personal workout. - Get a full body workout with exercises in all ranges of difficulty - While working out, follow the step by step workout-feature which take you through the workout using timers and your chosen specifics. - The timers support different workout types including Tabata, HIIT and Circuit training. - Challenge yourself, get rewards and keep track of your score. - Find exercises targeting specific muscle groups. Integration with Apple Health: Save burned calories and performed workouts. The Bag, is a crescent-shaped exercise equipment used in strength training, plyometric weight training, cardiovascular training, and general physical fitness. Exercises are performed by the professional instructor, Martin Söderblom.

About

Aikido Encyclopedia

Access a comprehensive video library of over 460 traditional Aikido techniques, including empty-hand, Jo, and Ken exercises. This tool aids practitioners of all levels in studying specific moves, expanding their repertoire, and organizing techniques for class planning or exam preparation.

Highlights
  • Extensive video library of 460+ techniques
  • Covers empty-hand, Jo, and Ken exercises
  • Detailed examples for study
  • Helps expand technique repertoire
  • Create and edit custom technique collections
  • Useful for teachers and students
Features
Read full description

Aikido Encyclopedia is a video library of over 460 traditional Aikido techniques. Aikido Encyclopedia includes clear examples of core empty-hand Aikido techniques as well as traditional Jo (wooden staff) and Ken(wooden sword) exercises. Aikido Encyclopedia was designed to assist both novice practitioners seeking to study the details of specific techniques as well as long-time practitioners looking for an easy way to expand their repertoire of techniques. Aikido Encyclopedia also allows users to easily create and edit collections of techniques for quick access. This feature is particularly helpful for Aikido teachers who are planning classes and for students preparing for rank examinations. Aikido Encyclopedia is a powerful tool for Aikidoka of all skill levels.

Screenshots

Stark Bag4 screens
Aikido Encyclopedia4 screens

Verdict

The call

The clearest difference is rating: Stark Bag at 4.8 against Aikido Encyclopedia's 4.2. Stark Bag also leads on update cadence (every 17 months vs every 97 months) and price ($4.99 vs $9.99). Aikido Encyclopedia's advantage is iOS requirement (12.0 vs 15.1). On review sentiment, 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

Stark Bag costs $4.99 and Aikido Encyclopedia $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Stark Bag holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Stark Bag has 50 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 80% of Stark Bag's written reviews are positive against 75% of Aikido Encyclopedia's.

UpkeepUpdate frequency

Stark Bag ships an update every 17 months, Aikido Encyclopedia every 97 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Stark Bag versus Aikido Encyclopedia: the parameters behind the verdict, then further details
ParameterStark BagAikido Encyclopedia
Price$4.99 — better$9.99
Rating4.8 (50 ratings) — better4.2 (6 ratings)
Positive reviews80.0% of reviews — better75.0% of reviews
Number of ratings50 — better6
Update frequencyEvery 17 months — betterEvery 97 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.112.0 — better
Further details — not scored
Size57 MB417 MB
Age rating4+4+
DeveloperPostra ABNerd Alchemy LLC

Customer experience

Stark Bag

All ratings50 ratings
Positive96.0%
Neutral2.0%
Negative2.0%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

Aikido Encyclopedia

All ratings6 ratings
Positive66.7%
Neutral16.7%
Negative16.7%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

Stark Bag

No in-app purchases

None

Aikido Encyclopedia

No in-app purchases

Questions

Is Stark Bag free?
Stark Bag costs $4.99, with no in-app purchases.
Is Aikido Encyclopedia free?
Aikido Encyclopedia costs $9.99, with no in-app purchases.
Which has better reviews, Stark Bag or Aikido Encyclopedia?
Stark Bag is rated higher. Stark Bag averages 4.8 out of 5 from 50 ratings, while Aikido Encyclopedia averages 4.2 from 6 ratings.
Do Stark Bag or Aikido Encyclopedia have ads?
Neither Stark Bag nor Aikido Encyclopedia shows ads.
Which is updated more often, Stark Bag or Aikido Encyclopedia?
Stark Bag ships an update every 17 months, and Aikido Encyclopedia every 97 months. Most recently, Stark Bag was updated on October 26, 2026 and Aikido Encyclopedia on October 24, 2026.

Other comparisons