# CostWatt vs Expense Diary

The clearest difference is price: Expense Diary at Free against CostWatt's $0.99. Expense Diary also leads on update cadence (every 4 days vs every 11 months) and device support. CostWatt's advantage is iOS requirement (17.0 vs 26.0). On in-app purchases there is nothing between them.

Expense Diary is free to download; CostWatt costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CostWatt ships an update every 11 months, Expense Diary every 4 days. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | CostWatt | Expense Diary |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 11 months | **Every 4 days** |
| Size | 3 MB | 19 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Rick Twilling](https://appshunter.io/developer/1790344644) | [John Paul Soriano](https://appshunter.io/developer/1711323946) |

## What reviewers say

### CostWatt

[App page](https://appshunter.io/ios/app/costwatt/id6590602388)

**In-app purchases:** none


### Expense Diary

[App page](https://appshunter.io/ios/app/expense-diary-expense-tracker/id6760805756)

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

**In-app purchases:** none


## Frequently asked questions

### Is CostWatt free?

CostWatt costs $0.99, with no in-app purchases.

### Is Expense Diary free?

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

### Which is updated more often, CostWatt or Expense Diary?

CostWatt ships an update every 11 months, and Expense Diary every 4 days. Most recently, CostWatt was updated on October 14, 2026 and Expense Diary on October 12, 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.*