Massive Dev Chart Timer vs ObscuraFlex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Massive Dev Chart Timer
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.
- Offline film development chart
- Multi-step timer with sound notifications
- Customizable agitation schemes
- Darkroom themes
- Dilution mixer
- Automated time/temperature compensation
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The Massive Dev Chart is the world's largest film development chart with easy to use multi step timer and darkroom support for iPhone and iPad. Watch the instructional video at: https://www.youtube.com/watch?v=P915z6THiY8. *** Features *** • Offline copy of The Massive Dev Chart in your pocket • Multi Step Timer with sound notifications • Customizable agitation scheme • Darkroom themes • Dilution Mixer • Support for two-step development and two-step fixing • Support for optional hypoclear and photo flo steps • Automated development time/temperature compensation
ObscuraFlex
This app provides a high-resolution, right-side-up live feed of your large format camera's image plane. It enhances composition and focusing, offering greater detail and clarity than a standard ground glass. Use it to shoot stills, video, or reference images alongside your film negatives.
- High-resolution live feed
- Right-side-up image display
- Composition and focusing aid
- Supports various large format cameras
- Capture stills and video
- Reference image creation
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ObscuraFlex is a camera app designed for use with the ObscuraFlex™ large format camera viewfinder adapter for cameras including 4x5 Graflex, Linhof, Chamonix, and some vintage Polaroid cameras. The app provides a high resolution live feed of your large format camera's image plane (ie: ground glass) rotated to reverse the upside-down image created by any traditional optical system. When using the camera adapter as a composition and focusing aid for large format film photography the ObscuraFlex™ provides a greater level of detail and clarity than working with a standard ground glass, and with an image that's right-side-up! You can also use the adapter with this app (or other camera app) to shoot stills, video, or reference images to accompany your film negatives.
Screenshots
Verdict
The clearest difference is price: ObscuraFlex at Free against Massive Dev Chart Timer's $9.99. ObscuraFlex also leads on rating (5.0 vs 3.7) and review sentiment (100% vs 71%). Massive Dev Chart Timer's advantage is ratings volume (55 vs 2) and chart position (#36 vs unranked). On ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
ObscuraFlex is free to download; Massive Dev Chart Timer costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ObscuraFlex holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Massive Dev Chart Timer has 55 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 71% of Massive Dev Chart Timer's written reviews are positive against 100% of ObscuraFlex's.
Massive Dev Chart Timer ships an update every 5 months, ObscuraFlex every 5 weeks. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.
| Parameter | Massive Dev Chart Timer | ObscuraFlex |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.7 (55 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 70.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 55 — better | 2 |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #36 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 14 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Freestyle Photo & Imaging | Toby Wilkins |
Customer experience
Massive Dev Chart Timer
ObscuraFlex
Bugs and requests
Massive Dev Chart Timer
Reported bugs
12 issues- 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
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- UI elements overlap on older iPhone models
- Safelight mode white banner blocks display on iPad
- Crashes during development process
- Home screen line emits bright light in darkroom mode
- App incompatible with newer iOS versions on older devices
- Notes don't word wrap properly
- Inconsistent film/developer availability between iPhone and iPad
Requested features
15 requests- 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
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- Volume calculator for stop bath and fixer
- Background timer functionality
- Custom step name editing
- Pull/push development times
- Stand development support with hour-based timing
- Apple Watch app
- Syncing between iPhone and iPad
- Fahrenheit temperature option
- Additional common film stocks (Portra, Fuji 400H, Ektar)
- Ability to add films not in database to custom times
ObscuraFlex
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Massive Dev Chart Timer
No in-app purchases
ObscuraFlex
No in-app purchases
Questions
Is Massive Dev Chart Timer free?
Is ObscuraFlex free?
Which has better reviews, Massive Dev Chart Timer or ObscuraFlex?
Do Massive Dev Chart Timer or ObscuraFlex have ads?
Which is updated more often, Massive Dev Chart Timer or ObscuraFlex?
Other comparisons
