# Ring Sizer vs TankLog

The clearest difference is rating: TankLog at 5.0 against Ring Sizer's 1.0. TankLog also leads on monetization model (free vs freemium) and device support (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Ring Sizer sells 2 in-app purchases, starting at $4.99 per 7 days and TankLog sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

TankLog holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Ring Sizer ships an update every 3 days, TankLog every 6 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Ring Sizer | TankLog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/ring-sizer-measuring-tool/id6759196779/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tanklog-aquascape/id6762062161/reviews)** |
| Number of ratings | 1 | **3** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 6 days |
| Monetization | Freemium | **Free** |
| Size | 9 MB | 4 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jack Oehling](https://appshunter.io/developer/1848598108) | [John Katez](https://appshunter.io/developer/1279354709) |

## What reviewers say

### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-measuring-tool/id6759196779)

This app transforms your phone into a precision tool for measuring ring sizes and finger dimensions. It helps you find the perfect fit for jewelry, convert between international sizing standards, and save multiple measurements.

**Highlights:** Instant ring sizing, Finger length measurement, Global size conversion, Save and manage sizes, Precision digital caliper

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per 7 days |
| Yearly | $24.99 | per year |


### 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 (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud Sync | $3.99 | one-time |


## Frequently asked questions

### Is Ring Sizer free?

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

### Is TankLog free?

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

### Which has better reviews, Ring Sizer or TankLog?

TankLog is rated higher. Ring Sizer averages 1.0 out of 5 from 1 ratings, while TankLog averages 5.0 from 3 ratings.

### Do Ring Sizer or TankLog have ads?

Neither Ring Sizer nor TankLog shows ads.

### Which is updated more often, Ring Sizer or TankLog?

Ring Sizer ships an update every 3 days, and TankLog every 6 days. Most recently, Ring Sizer was updated on October 28, 2026 and TankLog 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.*