Pendulum vs InstaPrint
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pendulum
This app helps you manage your pen pal relationships by tracking correspondence. Record when you send and receive letters, note writing materials, and set reminders to stay in touch. Sync your data across devices for seamless management.
- Track sent and received letters
- Record pen, ink, and paper used
- Set reminders to write and post
- Monitor letter delivery times
- iCloud sync across devices
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Pendulum - keep track of your pen pals! • Add your friends, record when you send them letters or they send something to you. See how long it takes for your letters to arrive! • Record what pen, ink, and paper you used to write to each person, to keep the variety going each time you write. • Reminders to write back, or to post letters you've written but have sat by the front door for ages; you won't forget to stay in touch again. • Sync via iCloud, so you can keep up to date regardless of what device you have to hand.
InstaPrint
This app enables inkless and wireless printing using Bluetooth connectivity. It is designed to work exclusively with a specific thermal printer model, making on-the-go printing simple and convenient.
- Inkless printing
- Wireless printing
- Bluetooth connectivity
- Instant printing
- Exclusive printer compatibility
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Introducing the InstaPrint app, compatible exclusively with the Core Innovations Thermal Printer. Enjoy inkless and wireless printing with Bluetooth connectivity, making printing a breeze. Print anything instantly!
Screenshots
Verdict
The clearest difference is review sentiment: Pendulum at 67% against InstaPrint's 19%. Pendulum also leads on rating (4.2 vs 2.6) and update cadence (every 9 days vs every 2 months). InstaPrint's advantage is in-app purchases (none vs 5) and ratings volume (161 vs 16). On price, 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
Both are free to download. Pendulum sells 5 one-off in-app purchases. InstaPrint asks for nothing beyond the download.
Pendulum holds the better App Store score, 4.2 against 2.6. That said, the two scores are not equally well evidenced: InstaPrint has 161 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 67% of Pendulum's written reviews are positive against 19% of InstaPrint's.
Pendulum ships an update every 9 days, InstaPrint every 2 months. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.
| Parameter | Pendulum | InstaPrint |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (16 ratings) — better | 2.6 (161 ratings) |
| Positive reviews | 66.7% of reviews — better | 19.2% of reviews |
| Number of ratings | 16 | 161 — better |
| Update frequency | Every 9 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Benjamin Cardy | Beiens (Shenzhen) Technology Co., Ltd. |
Customer experience
Pendulum
InstaPrint
Bugs and requests
Pendulum
Not enough reviews yet to summarise bugs or requests.
InstaPrint
Reported bugs
4 issues- App doesn't show all photos
- Printer not recognized by devices
- Printing orientation/sizing issues
- Frequent app crashes and freezes
Requested features
4 requests- Add color printing capability
- Improve photo printing quality
- Allow custom label/template creation
- Provide better instructions and support
In-app purchases
Pendulum
- Extra Fine Tip$0.99
- Fine Tip$1.99
- Medium Tip$3.99
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- Broad Tip$5.99
- Stub Tip$9.99
InstaPrint
No in-app purchases
