# eLABInventory vs Prompt Optimizer

The clearest difference is in-app purchases: eLABInventory at none against Prompt Optimizer's 5. Prompt Optimizer's advantage is update cadence (every 4 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Prompt Optimizer sells 5 in-app purchases, starting at $2.99 per month. eLABInventory asks for nothing beyond the download.

eLABInventory ships an update every 2 months, Prompt Optimizer every 4 days. The most recent releases landed on September 8, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | eLABInventory | Prompt Optimizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/elabinventory/id957290534/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 20 MB | 44 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bio-ITech BV](https://appshunter.io/developer/488109285) | [VideoMeet Private Limited](https://appshunter.io/developer/1588056376) |

## What reviewers say

### eLABInventory

[App page](https://appshunter.io/ios/app/elabinventory/id957290534)

Digitize your laboratory research with this inventory management tool. Track samples, manage equipment bookings, and receive crucial stock and experiment notifications. Secure your account with two-step verification.

**Highlights:** Scan 2D barcodes for sample information, Move or archive inventory items, View and book equipment, Receive stock and experiment notifications, Two-step account verification

**Features:** macOS Compatibility

**In-app purchases:** none


### Prompt Optimizer

[App page](https://appshunter.io/ios/app/prompt-optimizer/id6760383819)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Monthly | $2.99 | per month |
| Pro - Quarterly | $9.99 | per 3 months |
| Starter - 30 Credits | $0.99 | one-time |
| Growth - 75 Credits | $1.99 | one-time |
| Pro Pack - 180 Credits | $3.99 | one-time |


## Frequently asked questions

### Is eLABInventory free?

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

### Is Prompt Optimizer free?

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

### Do eLABInventory or Prompt Optimizer have ads?

Neither eLABInventory nor Prompt Optimizer shows ads.

### Which is updated more often, eLABInventory or Prompt Optimizer?

eLABInventory ships an update every 2 months, and Prompt Optimizer every 4 days. Most recently, eLABInventory was updated on September 8, 2026 and Prompt Optimizer on September 6, 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.*