Comparison

Stackd vs Underexpo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Stackd

Easily share large batches of photos with friends and groups. Recipients can swipe to save their favorites in full quality, while unwanted images disappear. Photos are end-to-end encrypted for privacy and stacks expire automatically.

Highlights
  • Send hundreds of photos at once
  • Swipe to keep or skip photos
  • Save photos in original quality
  • Create and share with groups
  • End-to-end encrypted sharing
  • Stacks expire automatically
  • Uploads only on Wi-Fi by default
Features
Read full description

Stop chasing "send me those pics". With Stackd, whoever took the photos sends the whole lot in one go, and everyone swipes through and keeps the ones they love. SEND A WHOLE STACK Tap +, drag across your photos to pick hundreds at once, and send them to friends or a group. It keeps uploading even if you leave the app. SWIPE TO KEEP THE BEST Swipe right to keep, left to skip. Near-identical shots are shown together so you can pick the best one. Close the app any time and carry on where you left off. SAVE IN FULL QUALITY The photos you keep save straight to your Photos as the originals, exactly as they were taken. The rest just disappear. GROUPS Share with the same people often? Make a group. Anyone in it can post a stack, and everyone else gets it to swipe. PRIVATE BY DESIGN • Photos are end-to-end encrypted, so only you and the people you share with can see them. Not even Stackd can. • Stacks disappear after 7 days, or up to 30 if the sender gives them more time. • You only get stacks from friends you've accepted and groups you've joined. • Senders can see who has swiped, but never which photos you kept. • Report or block any stack, photo or person from the ••• menu. Photos upload on Wi-Fi only unless you choose otherwise, so Stackd won't eat your data. Terms of Use: https://stackdsocial.co.uk/terms.html Privacy Policy: https://stackdsocial.co.uk/privacy.html

About

Underexpo

Capture photos with a vintage film aesthetic directly in the viewfinder. Apply filmic looks, grain, and dust overlays before you shoot. Adjust exposure, contrast, and color with simple sliders, then save your custom presets.

Highlights
  • Live film preview in viewfinder
  • Hand-graded filmic LUTs
  • Adjustable exposure, contrast, and color
  • Scanned dust and scratch overlays
  • Customizable grain and chromatic aberration
  • Save custom presets
  • On-device processing
Features
Read full description

UNDEREXPO Film looks, live in the viewfinder. Underexpo is not a pro camera and does not pretend to be. It is a small, fast film camera that shows you the look before you take the shot, so you can stop editing and start shooting. LIVE FILM PREVIEW Pick a look and the viewfinder changes with it. Grain, color, and contrast are all there before you press the shutter, not bolted on afterwards. FILMIC LOOKS Hand-graded filmic LUTs, from soft faded portraits to heavy contrast black & white. Tap through them and stop when one fits. DIAL IT IN Exposure, contrast, black point, saturation, temperature, tint, highlights, and shadows. Plain sliders, no menus to dig through. GRAIN & DUST Thirty scanned dust and scratch overlays, plus adjustable grain and chromatic aberration, for frames that look developed rather than filtered. SAVE YOUR PRESETS Found a combination you like? Save it as your own preset and shoot with it from then on. A CAMERA THAT STAYS OUT OF THE WAY Volume button shutter, rule of thirds grid, tap to focus, flash, 2x zoom, front camera, and your last shot one tap from the editor. Every shot saves straight to your library. BUILT FOR IPAD Split View and Slide Over are supported, and the camera preview keeps the right aspect ratio at every window size. PROCESSED ON YOUR DEVICE Your photos are processed on your device and never uploaded. Export straight to Photos with your metadata intact. Underexpose on purpose. UNDEREXPO PRO Film looks, editing tools, and the camera require an Underexpo Pro subscription. Choose weekly, with a free trial for eligible new subscribers, or yearly. Payment is charged to your Apple ID at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the period ends. Manage or cancel in your App Store account settings. PRIVACY POLICY AND TERMS OF USE: Apple App Store User Agreement - Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://tahatuna.com/underexpoprivacy For more information, please visit https://tahatuna.com For support, send an email to: ios@tahatuna.com

Screenshots

Stackd4 screens
Underexpo4 screens

Verdict

The call

The clearest difference is in-app purchases: Stackd at none against Underexpo's 4. Stackd also leads on update cadence (every 3 days vs fortnightly) and iOS requirement (18.0 vs 26.0). On price, review sentiment, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Underexpo sells 4 in-app purchases, starting at $3.99 per 7 days. Stackd asks for nothing beyond the download.

UpkeepUpdate frequency

Stackd ships an update every 3 days, Underexpo fortnightly. The most recent releases landed on November 12, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Stackd versus Underexpo: the parameters behind the verdict, then further details
ParameterStackdUnderexpo
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone, iPad — better
Requires iOS18.0 — better26.0
Further details — not scored
Size6 MB97 MB
Age rating12+4+
DeveloperJoshua CaplanAli Taha Tuna

Customer experience

Stackd

Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Underexpo

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stackd

No in-app purchases

4 purchases

Underexpo

Subscriptions3
  • Underexpo Pro Weekly3 Days trial$3.997 Days
  • Underexpo Pro Monthly$7.991 Month
  • Underexpo Pro Annual$24.991 Year
One-time1
  • Underexpo Lifetime Membership$19.99

Questions

Is Stackd free?
Stackd is free to download, with no in-app purchases.
Is Underexpo free?
Underexpo is free to download, with in-app purchases available.
Do Stackd or Underexpo have ads?
Neither Stackd nor Underexpo shows ads.
Which is updated more often, Stackd or Underexpo?
Stackd ships an update every 3 days, and Underexpo fortnightly. Most recently, Stackd was updated on November 12, 2026 and Underexpo on October 30, 2026.

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