# DF Tracker vs Bunker Stem

The clearest difference is in-app purchases: DF Tracker at none against Bunker Stem's 2. DF Tracker also leads on iOS requirement (13.4 vs 17.0). Bunker Stem's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Bunker Stem sells 2 in-app purchases, starting at $19.99 per month. DF Tracker asks for nothing beyond the download.

DF Tracker ships an update every 5 weeks, Bunker Stem every 2 weeks. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | DF Tracker | Bunker Stem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bunker-stem-fuel-calculator/id6777398984/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 9 MB |
| Requires iOS | **13.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ew Shen Tan](https://appshunter.io/developer/1592037937) | [Dmitriy Motorin](https://appshunter.io/developer/1495533596) |

## What reviewers say

### DF Tracker

[App page](https://appshunter.io/ios/app/df-tracker/id1291203273)

**Features:** macOS Compatibility

**In-app purchases:** none


### Bunker Stem

[App page](https://appshunter.io/ios/app/bunker-stem-fuel-calculator/id6777398984)

This app provides an offline workspace for managing bunker fuel delivery evidence. It allows users to record figures, samples, photos, and remarks, compare quantities, and preview a local evidence pack before export. Transparency features are free, with paid access for exporting and archiving.

**Highlights:** Offline evidence workspace, Bunker fuel quantity computer, BDN checklist, Stem workspace with status, Local Evidence Pack PDF preview, StoreKit export access

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Export Access | $19.99 | per month |
| Annual Export Access | $149.99 | per year |


## Frequently asked questions

### Is DF Tracker free?

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

### Is Bunker Stem free?

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

### Do DF Tracker or Bunker Stem have ads?

Neither DF Tracker nor Bunker Stem shows ads.

### Which is updated more often, DF Tracker or Bunker Stem?

DF Tracker ships an update every 5 weeks, and Bunker Stem every 2 weeks. Most recently, DF Tracker was updated on October 26, 2026 and Bunker Stem on October 31, 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.*