# kaizen | Adaptive Run Training vs Pacy

The clearest difference is in-app purchases: Pacy at none against kaizen | Adaptive Run Training's 15. kaizen | Adaptive Run Training's advantage is update cadence (every 10 days vs monthly) and iOS requirement (16.4 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. kaizen | Adaptive Run Training sells 15 in-app purchases, starting at $12.99 per month. Pacy asks for nothing beyond the download.

kaizen | Adaptive Run Training ships an update every 10 days, Pacy monthly. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | kaizen | Adaptive Run Training | Pacy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (29 ratings)](https://appshunter.io/ios/app/kaizen-adaptive-run-training/id1638679224/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 58.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Subscription | — |
| Size | 97 MB | 3 MB |
| Requires iOS | **16.4** | 18.6 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Run Kaizen LTD](https://appshunter.io/developer/1638679226) | [Qaos Ideas HB](https://appshunter.io/developer/834336833) |

## What reviewers say

### kaizen | Adaptive Run Training

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

This app uses your running history to calculate your current fitness and set dynamic weekly distance targets. It offers personalized training guidance to help you achieve your running goals, whether for a specific race or general improvement. The app provides race predictions and flexible training plans that adapt to your schedule.

**Highlights:** Data-driven training partner, Dynamic weekly distance targets, Personalized fitness calculations, Race predictions for various distances, Flexible training plans, Build consistency and improve fitness

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

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription | $12.99 | per month |
| Subscription | $12.99 | per month |
| Monthly Subscription | $14.99 | per month |
| Monthly Subscription | $14.99 | per month |
| 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 |
| Subscription | $69.99 | per year |
| Annual Subscription | $89.99 | per year |
| Annual Subscription | $89.99 | per year |
| Subscription | $89.99 | per year |
| 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


### Pacy

[App page](https://appshunter.io/ios/app/pacy/id6689512390)

**In-app purchases:** none


## Frequently asked questions

### Is kaizen | Adaptive Run Training free?

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

### Is Pacy free?

Pacy is free to download, with no in-app purchases.

### Do kaizen | Adaptive Run Training or Pacy have ads?

Neither kaizen | Adaptive Run Training nor Pacy shows ads.

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

kaizen | Adaptive Run Training ships an update every 10 days, and Pacy monthly. Most recently, kaizen | Adaptive Run Training was updated on October 25, 2026 and Pacy on October 14, 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.*