# Massive Dev Chart Timer vs RETO3D PRO

The clearest difference is rating: Massive Dev Chart Timer at 3.7 against RETO3D PRO's 3.0. Massive Dev Chart Timer also leads on review sentiment (71% vs 36%). RETO3D PRO's advantage is price ($4.99 vs $9.99) and update cadence (monthly vs every 5 months). On ratings volume, ads, in-app purchases and chart position there is nothing between them.

Massive Dev Chart Timer costs $9.99 and RETO3D PRO $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Massive Dev Chart Timer holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 54 and 38 respectively. Written reviews point the same way: 71% of Massive Dev Chart Timer's written reviews are positive against 36% of RETO3D PRO's.

Massive Dev Chart Timer ships an update every 5 months, RETO3D PRO monthly. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Massive Dev Chart Timer | RETO3D PRO |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | **[3.7 (54 ratings)](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770/reviews)** | [3.0 (38 ratings)](https://appshunter.io/ios/app/reto3d-pro/id1471496334/reviews) |
| Number of ratings | **54** | 38 |
| Positive reviews | **70.8% of reviews** | 35.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Paid | **Free** |
| Best chart rank | **#30** | #76 |
| Size | 14 MB | 290 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Freestyle Photo & Imaging](https://appshunter.io/developer/1786429988) | [RETO PRODUCTION LIMITED](https://appshunter.io/developer/1463746642) |

## What reviewers say

### Massive Dev Chart Timer

[App page](https://appshunter.io/ios/app/massive-dev-chart-timer/id402405770)

**Currently charting:** #30 Top Paid · Photo & Video (US App Store)

This app provides an offline film development chart and a multi-step timer for photographers. It includes customizable agitation, darkroom themes, and support for various developing and fixing steps. It also offers automated compensation for development time and temperature.

**Highlights:** Offline film development chart, Multi-step timer with sound notifications, Customizable agitation schemes, Darkroom themes, Dilution mixer, Automated time/temperature compensation

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

**In-app purchases:** none

**What reviewers like**

- 📚 Comprehensive film and developer database
- ⏱️ Reliable timer with agitation reminders
- 🎯 Easy-to-use interface for darkroom work
- 🌙 Darkroom mode with red/black display
- ✏️ Customizable development times and profiles

**What reviewers complain about**

- 🚫 Black and white film only (no color film support)
- 🐛 Recent update broke HC110 dilution display
- 🐛 App crashes on certain devices/iOS versions
- 💰 Price point ($8.99-$11.99) for limited functionality
- 🔍 Poor search functionality for films

**Reported bugs**

- HC110 dilution section displays only letters, not ratios
- Dilution ratios not calculating when solution amount adjusted
- App crashes after selecting film speed
- Crashes on iPad with new update
- Timer display shows three dots instead of seconds

**Requested features**

- Color film support (C-41, E-6, ECN-2 processes)
- Search functionality by film brand/name
- Ability to add custom process steps (presoak, toning)
- Individual agitation control per development stage
- Continuous agitation option


### RETO3D PRO

[App page](https://appshunter.io/ios/app/reto3d-pro/id1471496334)

**Currently charting:** #76 Top Paid · Photo & Video (US App Store)

Create captivating 3D effect videos from your photos. This app allows you to edit multiple images, add various visual effects, and customize your creations with ease. Share your unique 3D videos instantly on social media.

**Highlights:** Generate 3D effect videos, Edit up to 4 photos, Remove watermark, Apply photo effects, Add video effects (Frame in Frame, Light Leak, Film Border, Zoom, Dust), Crop and rotate video, Save and share creations

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

**In-app purchases:** none


## Frequently asked questions

### Is Massive Dev Chart Timer free?

Massive Dev Chart Timer costs $9.99, with no in-app purchases.

### Is RETO3D PRO free?

RETO3D PRO costs $4.99, with no in-app purchases.

### Which has better reviews, Massive Dev Chart Timer or RETO3D PRO?

Massive Dev Chart Timer is rated higher. Massive Dev Chart Timer averages 3.7 out of 5 from 54 ratings, while RETO3D PRO averages 3.0 from 38 ratings.

### Do Massive Dev Chart Timer or RETO3D PRO have ads?

Neither Massive Dev Chart Timer nor RETO3D PRO shows ads.

### Which is updated more often, Massive Dev Chart Timer or RETO3D PRO?

Massive Dev Chart Timer ships an update every 5 months, and RETO3D PRO monthly. Most recently, Massive Dev Chart Timer was updated on September 28, 2026 and RETO3D PRO on September 29, 2026.

### Which is more popular, Massive Dev Chart Timer or RETO3D PRO?

Massive Dev Chart Timer currently peaks at #30 in the App Store charts, and RETO3D PRO at #76. Chart position reflects recent download velocity rather than total install base.

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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.*