# Deflection Lite vs DeadLineTodo

Deflection Lite and DeadLineTodo both sit at 4.5 stars, but that hides the real split: 100% of DeadLineTodo's written reviews are positive against 44% of Deflection Lite's. DeadLineTodo also leads on update cadence (every 3 days vs every 3 months). Deflection Lite's advantage is in-app purchases (none vs 3) and ratings volume (47 vs 2). On price, rating, ads and device support there is nothing between them.

Both are free to download. DeadLineTodo sells 3 in-app purchases, starting at $1.99 per month. Deflection Lite asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.5 for Deflection Lite against 4.5 for DeadLineTodo. That said, the two scores are not equally well evidenced: Deflection Lite has 47 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 44% of Deflection Lite's written reviews are positive against 100% of DeadLineTodo's.

Deflection Lite ships an update every 3 months, DeadLineTodo every 3 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Deflection Lite | DeadLineTodo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (47 ratings)](https://appshunter.io/ios/app/deflection-lite/id974474071/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/deadlinetodo-ddl-management/id6477158822/reviews)** |
| Number of ratings | **47** | 2 |
| Positive reviews | 44.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Paid | **Freemium** |
| Size | 108 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Blue Ketchep](https://appshunter.io/developer/1131834248) | [林琴 黄](https://appshunter.io/developer/1519657884) |

## What reviewers say

### Deflection Lite

[App page](https://appshunter.io/ios/app/deflection-lite/id974474071)

This app provides interactive and precise structural beam analysis. Easily visualize beam bending by dragging loads and supports, and calculate key engineering results like reactions, shear force, and bending moment.

**Highlights:** Interactive beam bending visualization, Calculate reactions, shear force, and bending moment, Built-in cross-section databases, Unlimited loads and supports, Export design to shareable permalink, Metric and standard units

**Features:** Vision Pro support

**In-app purchases:** none


### DeadLineTodo

[App page](https://appshunter.io/ios/app/deadlinetodo-ddl-management/id6477158822)

This app helps users manage tasks and combat procrastination with features like progress block tracking, daily widgets, and synchronized reminders. It offers detailed statistics on efficiency, time spent, and task status, with multi-device sync and a dark mode option.

**Highlights:** Progress Block Tracking, Daily Task Widget, Synchronized Reminders, Calendar Synchronization, Repeat Tasks, Task Timer, Efficiency Score Statistics, iCloud Multi-Device Sync

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe to Monthly Premium | $1.99 | per month |
| Subscribe to Quarterly Premium | $2.99 | per 3 months |
| Purchase premium features | $8.99 | one-time |


## Frequently asked questions

### Is Deflection Lite free?

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

### Is DeadLineTodo free?

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

### Which has better reviews, Deflection Lite or DeadLineTodo?

DeadLineTodo is rated higher. Deflection Lite averages 4.5 out of 5 from 47 ratings, while DeadLineTodo averages 4.5 from 2 ratings.

### Do Deflection Lite or DeadLineTodo have ads?

Neither Deflection Lite nor DeadLineTodo shows ads.

### Which is updated more often, Deflection Lite or DeadLineTodo?

Deflection Lite ships an update every 3 months, and DeadLineTodo every 3 days. Most recently, Deflection Lite was updated on November 1, 2026 and DeadLineTodo on November 4, 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.*