51
BU Score
Solid
Reciprocity Plus
✍️ bumetric analysis
“
Reciprocity Plus is an iOS app from Le bord de la piscine in the Photo & Video category, currently rated 4.1★ across 7 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Our BU Score puts it at 51: Solid (established niche player). For a Photo & Video app, that means established niche player.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Mature app (11y old)METRIC | +$1,500 | |
| Good rating (4.1★)METRIC | +$800 | |
| Pre-traction phase (7 ratings)METRIC | −$300 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 8 MB🔞 4+📱 iOS 15.6+🔖 v1.26🔄 updated 8mo ago🌐 EN, FR📂 Photo & Video💰 Paid🚀 Launched 2014 (11y old)
📝 About this app
Reciprocity+ : photo tool, for calculating long exposure, for digital and analog photography. Are you tired of mentally multiplying exposure time with yor ND3+ND8 filters, and then adding reciprocity failure rate ? Reciprocity + is for you :
• 29 Filters : CTO, CTB, Green series, ND serie and more
• 110 Reciprocity charts included.
• Design your own chart or modify an existing one
• Share your charts with PInhole Assit App,
• Share by email
•Available charts :
• A chart adapted from Jim Shull's The Hole Thing
• Two charts for RC photo paper ,
• 400TX,TMX,TMY,HP5+,100 Delta (source APUG forums)
• max 400, T max 100,TRiX & Plus 125, Ilford films (Without Lenses website )
• Official Ilford films.
• Ektachrome, Fujichrome, Agfachrome and + from "Using the View Camera".
• Arista films (courtesy of David Aimone)
• Ilford Pan F, Fuji FP100, Fuji Neopan 100 ACROS, Ektar 100
• Fuji FP 3000B
• and more (119 films).
• A timer, of You can quit the app, no matter what you do, the timer will notify you when the exposure is over.
From the makers of Pinhole Assist.
• 29 Filters : CTO, CTB, Green series, ND serie and more
• 110 Reciprocity charts included.
• Design your own chart or modify an existing one
• Share your charts with PInhole Assit App,
• Share by email
•Available charts :
• A chart adapted from Jim Shull's The Hole Thing
• Two charts for RC photo paper ,
• 400TX,TMX,TMY,HP5+,100 Delta (source APUG forums)
• max 400, T max 100,TRiX & Plus 125, Ilford films (Without Lenses website )
• Official Ilford films.
• Ektachrome, Fujichrome, Agfachrome and + from "Using the View Camera".
• Arista films (courtesy of David Aimone)
• Ilford Pan F, Fuji FP100, Fuji Neopan 100 ACROS, Ektar 100
• Fuji FP 3000B
• and more (119 films).
• A timer, of You can quit the app, no matter what you do, the timer will notify you when the exposure is over.
From the makers of Pinhole Assist.
🆕 What's New · v1.26
We regularly update and enhance the application, for better and nicer pinhole shots.
In this version:
* code optimization
* compatibility with iOS 15/16/17/18 + 26
* new film: Frankenstein 200 BW 4x5
119 films available!
You don't find your favorite film ? Send us your request, we will fulfill it.
In this version:
* code optimization
* compatibility with iOS 15/16/17/18 + 26
* new film: Frankenstein 200 BW 4x5
119 films available!
You don't find your favorite film ? Send us your request, we will fulfill it.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Reciprocity Plus
- Developer
- Le bord de la piscine
- Bundle ID
- com.leborddelapiscine.reciprocity
- App Store URL
- Open in App Store
- Category
- Photo & Video
- Content rating
- 4+
- Languages
- EN, FR
Company
- Website
- www.facebook.com
- Tagline
- Not found
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $1.3K/mo
- Top-grossing rank
- Outside top 100 in US Photo & Video
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- Not found
📈Ratings growth7 ratings+600% lifetimeShow 3-year history estimate ▾
Tracked (5 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
More by Le bord de la piscine
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Full revenue analysis
Read the article-style breakdown for Reciprocity Plus: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.