# Simple Memo Matelial vs Deadline Backsolve

The clearest difference is price: Simple Memo Matelial at Free against Deadline Backsolve's $0.99. Simple Memo Matelial also leads on iOS requirement (15.6 vs 17.0). Deadline Backsolve's advantage is in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

Simple Memo Matelial is free to download; Deadline Backsolve costs $0.99 up front. Simple Memo Matelial sells 2 one-off in-app purchases. Deadline Backsolve asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Simple Memo Matelial | Deadline Backsolve |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | — | Paid |
| Size | 21 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Morikawa Tatsunosuke](https://appshunter.io/developer/1736869704) | [Daisuke Yamaguchi](https://appshunter.io/developer/880950899) |

## What reviewers say

### Simple Memo Matelial

[App page](https://appshunter.io/ios/app/simple-memo-matelial/id6479680760)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support developers | $0.99 | one-time |
| Support developers | $2.99 | one-time |


### Deadline Backsolve

[App page](https://appshunter.io/ios/app/deadline-backsolve-planner/id6796252958)

This app helps you adjust project plans when deadlines are at risk. It calculates the shortfall and suggests concrete adjustments like extending deadlines or reducing scope. The interface is currently in Japanese only.

**Highlights:** Calculates shortfall and suggests fixes, Adjusts plans based on available time, Learns user's real work pace, Offers recovery plan options, Focus timer that survives crashes, Offline functionality, JSON export/import for data transfer

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

**In-app purchases:** none


## Frequently asked questions

### Is Simple Memo Matelial free?

Simple Memo Matelial is free to download, with in-app purchases available.

### Is Deadline Backsolve free?

Deadline Backsolve costs $0.99, with no in-app purchases.

### Do Simple Memo Matelial or Deadline Backsolve have ads?

Neither Simple Memo Matelial nor Deadline Backsolve shows ads.

### Which is updated more often, Simple Memo Matelial or Deadline Backsolve?

Simple Memo Matelial ships an update every 4 days, and Deadline Backsolve every 4 days. Most recently, Simple Memo Matelial was updated on October 7, 2026 and Deadline Backsolve on October 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.*