# TankLog vs ReefDrift

The clearest difference is in-app purchases: TankLog at none against ReefDrift's 3. TankLog also leads on ads (none vs shown) and update cadence (every 5 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. ReefDrift sells 3 in-app purchases, starting at $3.99 per month. TankLog asks for nothing beyond the download.

TankLog ships an update every 5 days, ReefDrift every 2 weeks. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TankLog | ReefDrift |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tanklog-aquascape/id6762062161/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Monetization | Free | — |
| Size | 3 MB | 16 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [John Katez](https://appshunter.io/developer/1279354709) | [Muge Akalin](https://appshunter.io/developer/1701314808) |

## What reviewers say

### TankLog

[App page](https://appshunter.io/ios/app/tanklog-aquascape/id6762062161)

This app helps you meticulously track your aquarium's water chemistry, maintenance, and livestock. It offers detailed logging for water parameters, customizable schedules, and equipment inventory, all while prioritizing user privacy with no data collection.

**Highlights:** Water chemistry tracking, Customizable maintenance schedules, Livestock and plant inventory, Equipment tracker, CO₂ estimation, Privacy-focused, no data collection

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

**In-app purchases:** none


### ReefDrift

[App page](https://appshunter.io/ios/app/reefdrift-reef-parameter-log/id6775145577)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefDrift Pro Monthly | $3.99 | per month |
| ReefDrift Pro Yearly | $19.99 | per year |
| ReefDrift Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is TankLog free?

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

### Is ReefDrift free?

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

### Do TankLog or ReefDrift have ads?

ReefDrift shows ads; TankLog does not.

### Which is updated more often, TankLog or ReefDrift?

TankLog ships an update every 5 days, and ReefDrift every 2 weeks. Most recently, TankLog was updated on October 13, 2026 and ReefDrift on October 10, 2026.

---

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