# Sum Calculator Memo vs DotChi?

The clearest difference is in-app purchases: Sum Calculator Memo at none against DotChi?'s 1. Sum Calculator Memo also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.6). DotChi?'s advantage is update cadence (every 9 days vs every 11 months). On price and ads there is nothing between them.

Both are free to download. DotChi? sells 1 one-off in-app purchase. Sum Calculator Memo asks for nothing beyond the download.

Sum Calculator Memo ships an update every 11 months, DotChi? every 9 days. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Sum Calculator Memo | DotChi? |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sum-calculator-memo/id6445968148/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 11 months | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 17 MB | 8 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) | [Kenji Shimura](https://appshunter.io/developer/1588159987) |

## What reviewers say

### Sum Calculator Memo

[App page](https://appshunter.io/ios/app/sum-calculator-memo/id6445968148)

Easily calculate the total cost of multiple items while shopping. This app allows you to input product names and amounts, with options to adjust units for weight or length calculations. Saved lists enable easy comparison and later review of your purchases.

**Highlights:** Automatic total calculation, Product name and amount entry, Unit conversion (weight, length), Quantity setting toggle, Save and compare lists, Supports multiple units

**Features:** macOS Compatibility

**In-app purchases:** none


### DotChi?

[App page](https://appshunter.io/ios/app/dotchi/id6747911700)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $0.99 | one-time |


## Frequently asked questions

### Is Sum Calculator Memo free?

Sum Calculator Memo is free to download, with no in-app purchases.

### Is DotChi? free?

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

### Do Sum Calculator Memo or DotChi? have ads?

Both Sum Calculator Memo and DotChi? show ads.

### Which is updated more often, Sum Calculator Memo or DotChi??

Sum Calculator Memo ships an update every 11 months, and DotChi? every 9 days. Most recently, Sum Calculator Memo was updated on October 2, 2026 and DotChi? on October 11, 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.*