# Prokopton vs JustLmk

The clearest difference is in-app purchases: JustLmk at none against Prokopton's 3. JustLmk also leads on iOS requirement (16.0 vs 18.0). Prokopton's advantage is update cadence (every 3 days vs weekly). On price, ads and device support there is nothing between them.

Both are free to download. Prokopton sells 3 one-off in-app purchases. JustLmk asks for nothing beyond the download.

Prokopton ships an update every 3 days, JustLmk weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Prokopton | JustLmk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/justlmk/id6762502415/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | — | Free |
| Size | 23 MB | 6 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Marcel Timm](https://appshunter.io/developer/1846068948) | [Mehul Jasti](https://appshunter.io/developer/1759822616) |

## What reviewers say

### Prokopton

[App page](https://appshunter.io/ios/app/prokopton/id6754165468)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Desire | $0.99 | one-time |
| Action | $1.99 | one-time |
| Assent | $2.99 | one-time |


### JustLmk

[App page](https://appshunter.io/ios/app/justlmk/id6762502415)

Never miss a class or library spot again. This app notifies you when desired spots become available, helping you secure your place in popular courses and study locations.

**Highlights:** Class availability alerts, Library spot notifications, Real-time updates, Easy subscription to classes, Find open study spaces

**In-app purchases:** none


## Frequently asked questions

### Is Prokopton free?

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

### Is JustLmk free?

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

### Do Prokopton or JustLmk have ads?

Neither Prokopton nor JustLmk shows ads.

### Which is updated more often, Prokopton or JustLmk?

Prokopton ships an update every 3 days, and JustLmk weekly. Most recently, Prokopton was updated on November 5, 2026 and JustLmk on November 5, 2026.

---

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