# Cost Index vs OneMoreTask

The clearest difference is update cadence: OneMoreTask at every 7 months against Cost Index's every 16 months. Cost Index's advantage is iOS requirement (8.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Cost Index ships an update every 16 months, OneMoreTask every 7 months. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Cost Index | OneMoreTask |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cost-index/id671845599/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 7 months** |
| Monetization | Free | — |
| Size | 3 MB | 31 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Flight Efficiency Limited](https://appshunter.io/developer/466443228) | [OMT Solutions Oy](https://appshunter.io/developer/1706531635) |

## What reviewers say

### Cost Index

[App page](https://appshunter.io/ios/app/cost-index/id671845599)

This app helps airline and corporate aircraft operators achieve significant operational savings by calculating the optimum cruise speed for flights based on pilot-inputted conditions and aircraft-specific data. It offers advanced features for cost, fuel, and time optimization, including level change analysis and turbulence margin adjustments.

**Highlights:** Optimum cruise speed calculation, Customizable operational data display, Minimum fuel burn speed for long range, Turbulence margin adjustment, Level change analysis for climb/descent decisions, Automated data updates

**Features:** macOS Compatibility

**In-app purchases:** none


### OneMoreTask

[App page](https://appshunter.io/ios/app/onemoretask/id6465346628)

**In-app purchases:** none


## Frequently asked questions

### Is Cost Index free?

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

### Is OneMoreTask free?

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

### Do Cost Index or OneMoreTask have ads?

Neither Cost Index nor OneMoreTask shows ads.

### Which is updated more often, Cost Index or OneMoreTask?

Cost Index ships an update every 16 months, and OneMoreTask every 7 months. Most recently, Cost Index was updated on October 6, 2026 and OneMoreTask on October 5, 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.*