# Sensory Abstract#3 vs OgdenSpine

The clearest difference is in-app purchases: Sensory Abstract#3 at none against OgdenSpine's 4. Sensory Abstract#3 also leads on iOS requirement (16.4 vs 18.6). OgdenSpine's advantage is update cadence (fortnightly vs every 63 months). On price, ads and device support there is nothing between them.

Both are free to download. OgdenSpine sells 4 in-app purchases, starting at $1.99 per month. Sensory Abstract#3 asks for nothing beyond the download.

Sensory Abstract#3 ships an update every 63 months, OgdenSpine fortnightly. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sensory Abstract#3 | OgdenSpine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ogdenspine/id6772943882/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 62.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 63 months | **Fortnightly** |
| Monetization | — | Freemium |
| Size | 9 MB | 12 MB |
| Requires iOS | **16.4** | 18.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sensory App House Ltd](https://appshunter.io/developer/1361994084) | [Naihe Hu](https://appshunter.io/developer/564180065) |

## What reviewers say

### Sensory Abstract#3

[App page](https://appshunter.io/ios/app/sensory-abstract3/id1533600000)

**Features:** macOS Compatibility

**In-app purchases:** none


### OgdenSpine

[App page](https://appshunter.io/ios/app/ogdenspine/id6772943882)

Master English with a core vocabulary of 850 essential words. This app offers multilingual support, daily word reviews, sentence practice, and writing tools to build clear communication skills.

**Highlights:** 850 core English words, Multilingual support, Daily word review, Sentence practice, Writing analysis, Progress tracking

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MonthlyPro | $1.99 | per month |
| YearlyPro | $19.99 | per year |
| Life Time Pro | Free | one-time |
| Capture Unlock | $5.99 | one-time |


## Frequently asked questions

### Is Sensory Abstract#3 free?

Sensory Abstract#3 is free to download, with no in-app purchases.

### Is OgdenSpine free?

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

### Do Sensory Abstract#3 or OgdenSpine have ads?

Neither Sensory Abstract#3 nor OgdenSpine shows ads.

### Which is updated more often, Sensory Abstract#3 or OgdenSpine?

Sensory Abstract#3 ships an update every 63 months, and OgdenSpine fortnightly. Most recently, Sensory Abstract#3 was updated on October 14, 2026 and OgdenSpine on October 25, 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.*