# Sustainable Discipline vs Trainkeep

The clearest difference is in-app purchases: Sustainable Discipline at none against Trainkeep's 4. Sustainable Discipline also leads on ads (none vs shown). Trainkeep's advantage is update cadence (daily vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Trainkeep sells 4 in-app purchases, starting at $23.99 per month. Sustainable Discipline asks for nothing beyond the download.

Sustainable Discipline ships an update fortnightly, Trainkeep daily. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sustainable Discipline | Trainkeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trainkeep/id6815014762/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Daily** |
| Size | 100 MB | 59 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FITsociety BV (Apps)](https://appshunter.io/developer/1756257213) | [Trainkeep LLC](https://appshunter.io/developer/900357806) |

## What reviewers say

### Sustainable Discipline

[App page](https://appshunter.io/ios/app/sustainable-discipline/id6741097058)

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

**In-app purchases:** none


### Trainkeep

[App page](https://appshunter.io/ios/app/trainkeep/id6815014762)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solo — monthly | $23.99 | per month |
| Pro — monthly | $37.99 | per month |
| Solo — annual | $239.99 | per year |
| Pro — annual | $379.99 | per year |


## Frequently asked questions

### Is Sustainable Discipline free?

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

### Is Trainkeep free?

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

### Do Sustainable Discipline or Trainkeep have ads?

Trainkeep shows ads; Sustainable Discipline does not.

### Which is updated more often, Sustainable Discipline or Trainkeep?

Sustainable Discipline ships an update fortnightly, and Trainkeep daily. Most recently, Sustainable Discipline was updated on October 25, 2026 and Trainkeep on October 24, 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.*