# kaizen | Adaptive Run Training vs SplitShiftr

The clearest difference is ads: kaizen | Adaptive Run Training at none against SplitShiftr's shown. On price, update cadence, in-app purchases 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 and SplitShiftr sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

kaizen | Adaptive Run Training ships an update every 10 days, SplitShiftr every 5 days. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | kaizen | Adaptive Run Training | SplitShiftr |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 10 days | **Every 5 days** |
| Monetization | Subscription | — |
| Size | 97 MB | 6 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Run Kaizen LTD](https://appshunter.io/developer/1638679226) | [Jack Barrell](https://appshunter.io/developer/1881360137) |

## 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


### SplitShiftr

[App page](https://appshunter.io/ios/app/splitshiftr/id6759874445)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReRun Pro | $2.99 | per month |
| ReRun Pro Annual | $19.99 | per year |


## Frequently asked questions

### Is kaizen | Adaptive Run Training free?

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

### Is SplitShiftr free?

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

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

SplitShiftr shows ads; kaizen | Adaptive Run Training does not.

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

kaizen | Adaptive Run Training ships an update every 10 days, and SplitShiftr every 5 days. Most recently, kaizen | Adaptive Run Training was updated on October 27, 2026 and SplitShiftr on October 7, 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.*