# Datum vs OdoKeep

The clearest difference is iOS requirement: OdoKeep at 17.0 against Datum's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Datum sells 7 one-off in-app purchases and OdoKeep sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Datum | OdoKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/datum-private-data-tracker/id6784786088/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 78 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EKPQA, LLC](https://appshunter.io/developer/383063546) | [Rafael Soares](https://appshunter.io/developer/6803634190) |

## What reviewers say

### Datum

[App page](https://appshunter.io/ios/app/datum-private-data-tracker/id6784786088)

This app allows you to track virtually anything, from daily habits to specific metrics, with customizable input methods and data visualization. It prioritizes user privacy by keeping all data on your device and offers extensive personalization options.

**Highlights:** Track anything with custom units, Multiple input styles (stepper, tally, dial), Bundle trackers into check-ins, Pre-made check-in templates, Customizable dashboard and charts, Attach photos, voice notes, and text, Integrates with Siri and Shortcuts

**Features:** Family Sharing

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculated Fields | $7.99 | one-time |
| Attachments | $7.99 | one-time |
| Automations | $7.99 | one-time |
| Unlimited Trackers | $7.99 | one-time |
| Connected Trackers | $7.99 | one-time |
| Datum Pro | $19.99 | one-time |
| Early Adopter | $49.99 | one-time |


### OdoKeep

[App page](https://appshunter.io/ios/app/odokeep-car-maintenance-log/id6803634188)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OdoKeep Plus Monthly | $1.99 | per month |
| OdoKeep Plus Annual | $12.99 | per year |
| OdoKeep Plus Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Datum free?

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

### Is OdoKeep free?

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

### Do Datum or OdoKeep have ads?

Neither Datum nor OdoKeep shows ads.

### Which is updated more often, Datum or OdoKeep?

Datum ships an update every 2 days, and OdoKeep every 2 days. Most recently, Datum was updated on October 24, 2026 and OdoKeep on October 15, 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.*