FLXBL vs Kaizo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FLXBL
Read full descriptionHide full description
Discover new activities and exercise classes where you are! Through FLXBL trainers, instructors and organisers can offer their activities to you directly. Try something new or find what you enjoy. FIND - BOOK - PAY - PARTICIPATE *For clients *No subscription *Find training where you are *The app handles booking / cancellation and payment *Great variety of activities *Pay only for the training you participate in *Show up at the agreed location and join *Book an instructor to give classes for your group of friends, family or colleagues For instructor Through the FLXBL app you can arrange workouts and activities You decide where and when the training will take place You decide the maximum number of participants per class (minimum 3) You can arrange individual trainings or courses that run for several weeks By organizing exercise classes through FLXBL, you collect points which you can exchange for exciting courses and workshops
Kaizo
Read full descriptionHide full description
Kaizo is an app that allows users to receive workouts, diet plans, and follow-up from their coach. The app serves as a supplement to an external coaching platform where the user already has access. With Kaizo, users can: - View assigned workouts - Track personal goals and log progress - Receive feedback from their trainer - Communicate and keep track of their activities Kaizo is designed to make communication and follow-up between coach and client more organized and accessible.
Screenshots
Verdict
The clearest difference is update cadence: Kaizo at every 9 days against FLXBL's monthly. Kaizo also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
FLXBL ships an update monthly, Kaizo every 9 days. Both last shipped on October 25, 2026.
| Parameter | FLXBL | Kaizo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 54 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | FLXBL AS | Vegard Karlsson |
In-app purchases
FLXBL
No in-app purchases
Kaizo
No in-app purchases









