# kaizen | Adaptive Run Training vs Shape Calendar

The clearest difference is update cadence: Shape Calendar at weekly against kaizen | Adaptive Run Training's fortnightly. kaizen | Adaptive Run Training's advantage is iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. kaizen | Adaptive Run Training sells 10 in-app purchases, starting at $12.99 per month and Shape Calendar sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

kaizen | Adaptive Run Training ships an update fortnightly, Shape Calendar weekly. The most recent releases landed on November 13, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | kaizen | Adaptive Run Training | Shape Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (31 ratings)](https://appshunter.io/ios/app/kaizen-adaptive-run-training/id1638679224/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 58.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 97 MB | 19 MB |
| Requires iOS | **16.4** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Run Kaizen LTD](https://appshunter.io/developer/1638679226) | [Samuel Christoffer Kraft](https://appshunter.io/developer/1826569823) |

## What reviewers say

### kaizen | Adaptive Run Training

[App page](https://appshunter.io/ios/app/kaizen-adaptive-run-training/id1638679224)

This app analyzes your running history from connected services to create personalized training plans. It adapts to your progress and goals, offering flexible workout structures to help you improve your performance for races or general fitness.

**Highlights:** Load-based run training analysis, Connects with Strava, Garmin, Apple Health, Personalized training load calculation, Supports 5K, 10K, half marathon, marathon goals, Flexible training structures (Even Spread, 1 Long 1 Hard, Build Your Own), Adaptive workout adjustments, Distance, pace, and elevation load calculation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription | $12.99 | per month |
| Monthly Subscription | $14.99 | per month |
| Monthly Subscription | $14.99 | per month |
| Subscription | $19.99 | per 3 months |
| Subscription | $24.99 | per 3 months |
| Quarterly Subscription | $34.99 | per 3 months |
| Quarterly Subscription | $34.99 | per 3 months |
| Subscription | $49.99 | per year |
| Annual Subscription | $89.99 | per year |
| Annual Subscription | $89.99 | per year |

**What reviewers like**

- ✨ Adaptive and flexible training
- 🎯 Accurate race predictions
- 📈 Helps with improvement and progress
- 💡 Simple and effective concept
- 🤝 Good customer support

**What reviewers complain about**

- 🐛 Very buggy and unstable
- 📉 Inaccurate predictions sometimes
- 🤔 Confusing to understand and use
- 💰 Expensive subscription fee
- ⏳ Lacks advanced features

**Reported bugs**

- Setup process crashes or loops
- App crashes frequently
- Mileage calculations are incorrect
- Planned mileage doesn't add up correctly
- App doesn't get past the first step

**Requested features**

- Allow editing of runs
- More personalization in training plans
- Ability to start the training week on different days
- Consider elevation in training calculations
- Add more workout suggestions and paces


### Shape Calendar

[App page](https://appshunter.io/ios/app/shape-calendar-training-plan/id6748612810)

**Features:** Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shape Pro Monthly | $4.99 | per month |
| Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is kaizen | Adaptive Run Training free?

kaizen | Adaptive Run Training is free to download, with in-app purchases available.

### Is Shape Calendar free?

Shape Calendar is free to download, with in-app purchases available.

### Do kaizen | Adaptive Run Training or Shape Calendar have ads?

Neither kaizen | Adaptive Run Training nor Shape Calendar shows ads.

### Which is updated more often, kaizen | Adaptive Run Training or Shape Calendar?

kaizen | Adaptive Run Training ships an update fortnightly, and Shape Calendar weekly. Most recently, kaizen | Adaptive Run Training was updated on November 13, 2026 and Shape Calendar on November 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*